PWS MK214

DMack

1SG
Full Member
Minuteman
Nov 15, 2006
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Well, as promised... I am about to start some lengthy testing of the PWS MK214 from Primary Weapons Systems. I have been running the MK114 and the MK110 for a while now, and find them absolutely supurb. Here is what I have in mind for this rifle.

My full time gig is a Tactical Law Enforcement Trainer. My scope of duty leads me to be the chief instructor for our Long Range Marksmanship training. I have the honor of training and networking with some of the finest SWAT teams in the State of Florida on a very regular basis, and we are blessed with some very good ranges.

I wanted to have a rifle that was a bit unorthodox, and since I have been using the PWS MK1 series rifles, and find them absolutely reliable and very accurate, I wanted to see what I could do with a "box" stock MK2 series rifle. My request was very straight forward. I needed an AR platform that was "Anvil Tough and Swiss Watch Reliable" that was able to make a cold bore "T-Zone" shot from arms length out to 150 or 200 yards.

Why so short of a distance? Well, my intended use is the Law Enforcement arena. We all know that the tactical marksman has the distinct possibility to be called upon in a stand off situation, and "may" be able to make a 300 or 400 yard shot... given the positive identification of the target... and all other parameters being met. However, the Law Enforcement "Sniper" differs from the Military Sniper... in one distinct way. As a Law Enforcement Marksman, I may be called upon to make a cold bore cranial vault shot in a hostage situation... or a barricaded subject scenario. If the suspect is holding an innocent hostage at gunpoint, I need to be one hundred percent certain that I can completely shut that subject down, without fear of a sympathetic shot, harming the hostage. So, do I need a gun that is capable of an 800 yard shot? Well... I know I am not capable of making a cranial vault shot every time at 800 yards, so... if I get called out, most likely I will close the distance to where I am positive that I can shut the subject down.

The venerable .308 platform has tons of ballistics out there, has been proven in the Law Enforcement Community as well as the Military Community, and rounds are plentiful. It does fairly well against barriers (windshields, windows, etc...) and is also very versatile.

This is quoted directly from the PWS webpage...

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"The MK2 series, developed by Primary Weapons Systems, and based on the SR25 platform, has been built from the ground up as a short barreled rifle for those requiring the venerable 7.62x51 in a compact package. Utilizing our proven long stroke piston system, the MK1 series greatly reduces fouling in the action of the weapon making it as reliable as the AK47 that it was designed after.

The origins of the MK2 series began with the fascination in the simplicity and reliability of the AK47 combined with a deep-rooted appreciation for the ergonomics of the SR25 platform. Having a significant understanding of the deficiencies in the direct gas impingement operating system found on conventional AR10/SR25-style weapons, PWS developed the MK2 series with the professional operator in mind.

Significant product improvements have been made over both the direct impingement operating system and previous offerings of piston-driven operating systems. Our product improvements have addressed reliability and performance issues as well as reduced carrier tilt, cam pin wear and carrier bounce.

An innovative hand guard system utilizes a proprietary non-free float system that allows the end user or unit armorer to replace individual rails as needed without removing the barrel, barrel nut or even other rails. This system allows the user to attach numerous picatinny rail mounted devices such as sights, lights, and laser aiming devices.

The PWS proprietary operating system utilizes an operating rod that is attached to the carrier and a floating head piston that is attached to the operating rod. The MK2 series is built to be a true combat carbine. With no unnecessary gas adjustments and only one moving assembly, this is the most rugged, simple and versatile piston operating system available.

The MK214 features a pinned FSC30 muzzle device that brings the overall length to 16.1" and is thus not considered a short barreled rifle."

PWS MK214 User's Manual

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I have a few very nice bolt guns. But, since I wanted to be unorthodox... I chose to try an AR platform. Now, there are many amazing AR platforms out there in the .308 caliber. But, I wanted to do something different. I wanted a short barrel, with enough velocity to penetrate barriers easily, and hold enough accuracy for a T-Zone shot out to 200 yards. The short barrel and collapsible stock would make getting in and out of the Bear Cat a lot easier, and also make rappelling easier.

So, enter the MK214. I went with the 14.5" barrel, to retain decent muzzle velocity... and with the PWS PRC (Precision Rifle Compensator) it would keep the BATFE happy, and negate me adding another stamp to my NFA trust.

I talked with Todd Tuttle at PWS in great detail about this rifle. We originally wanted to do the MK212, but the stamp issue, and me traveling with this rifle pushed it up to the 214. I also could have asked them to spec the chamber for me, and make it more of a "match" chamber... but, I wanted to see what I could do with this rifle just as it would come off the shelf.

The PWS rifles come spec'd very well, for what they cost. With this rifle, I knew I had to make sure I had good glass, and a good trigger. I chose the Geissele SD-E trigger that I have grown to love so much. I also chose the US Optics SN3 in 3.2-17 power with the EREK, TPAL and red illuminated reticle. The only thing I have yet to do, is sort out the mounting of the optics, discard the MOE pistol grip, and add some bipods. I also have to work out a sling system, because this rifle will see some rappelling, fast roping, and some maritime operations.

I will be updating this thread as I conduct the tests. I will provide true chrono numbers for various loads, as well as accuracy tests, and barrier testing. I will be shooting through vehicle windshields, safety glass, doors, etc... at various ranges, and will let you know how it does.

I have very high hopes for this rifle... the fit is outstanding. The rifle balances so well, even with the HONKING SN3 on it. Yes, it looks funny. Yes, it's unorthodox... but, is it going to fill a niche that I am looking for it to fill?

We shall see.

Here is the first picture of many to come. Please be patient, as I have a ton on my plate. Next week, I will be out of the loop... but this rifle will make it's debut on one of our Sniper Training days in July.

I just mounted the optic on very quickly, to get a feel of how it balanced, and to check eye relief.

MK214005a.jpg


I will cover the rails with some ladder rail covers... add some Bipods (still researching what to use) and change out the MOE to a MIAD, so it fits my gorilla paws better. I may or may not keep the VLTOR stock on there, depending on how the rifle deploys.

The buffer in this rifle, helps tame the recoil, along with the amazing PRC. If I switch out to the PRS, or UBR, I would have to change the buffer system. So, we shall see.

I would like to thank Todd at PWS for his continuing support. He is not only a very decent fella to speak with, he's also a shooter himself.

I'd also like to thank Jason Kyle at US Optics for getting this scope built for me so quickly. I have long been a fan of US Optics, used them down range, and could not think of a piece of glass I'd rather use than this one. Great company to deal with, and Jason is a shooter himself. It's refreshing to speak with a Customer Rep that is so well educated in his products, and can speak as detailed as you need when researching what would be the best fit.

This is a great forum, that has taught me so much just from lurking. Lowlight and his outstanding reviews has helped me in many unspoken ways.

So, stay tuned... much more to follow.
 
Re: PWS MK214

Redmass... thank you so much. My review on the MK114 was a bit unorganized, simply because I am not a professional writer, I'm just a hard use kind of guy.

The cool thing about this rifle, is that it was never intended to be a "precision" rifle. The accuracy I find in the MK1 series rifles, and how well they run prompted me to try this experiment with the MK2.

This rifle does not have free floating rails. The way it is designed precludes them from making the rails free floating. This is also designed to be a battle rifle, shot from a carrying position. However, due to the short barrel, and just how darned beefy this thing is, I think it will be just fine as long as I don't crank down into the bipods and transmit any torque into the barrel.

I'm very anxious to see how the accuracy changes shooting from the bipods as heat comes into the barrel.

These things are built like battle tanks. My goal is to fill a niche within the Law Enforcement community, so... we shall see if it can do it.

I will be TDY on a training mission for the next week, but once I return, this thread will gain traction. I've learned a lot since my last one, so this will remain focused.

Be safe out there everyone.
 
Re: PWS MK214

Ok, here is a bit of information for those that are interested.

The Core of the PWS MK2 series rifles (7.62x51 NATO)are the barrels. These rifle barrels start as a Stainless Steel Barrel Blank with a 1:10 twist. The blanks are produced for PWS by Bergara Barrels. PWS throats and chambers the barrel blanks themselves there at the PWS factory. I spoke in depth with Todd about this. The barrels are chambered in 7.62x51 NATO and NOT .308 Winchester. These rifles are battle rifles. Not to be intended to be used as I am going to use it... but, due to the high quality of the barrel, I believe it will fill my niche nicely. The chamber, even though it is 7.62 NATO, it is held within .003 from the MINIMUM. In other words, it is only .003 from bare minimum of NATO chamber specs. What does this mean? Well... I am quite positive that there are members on this board that can explain this MUCH better than I can. Let's just say, in layman's terms, the chamber is tight. This should induce the accuracy I am looking for out to 200 yards.

Because of the wandering thicknesses and thus the potential for a loss in accuracy, PWS chose to use the stainless steel barrel with an "ISONITE" coating.

ISONITE (AMS 2755) is a high-performance variety of salt bath nitrocarburizing. It is a thermochemical diffusion process whereby nitrogen-bearing salts generate a controlled release of nitrogen at the interface of a ferrous part.

The benefits of Isonite include:
Low Material Distortion Following Treatment
Greater Resistance to abrasion and seizure
Pitting Resistance is Increased 50% to 100%
Heat Resistance
Corrosion Resistance
Material Tensile Strength and Stiffness Are Enhanced
Improved Durability

*** Isonite treatment makes the metal "hard as hell" and it is said to have all the benefits of hard chroming, without the thickness variations involved. My experience with the Isonite treatment on the MK1 series rifles is that it just flat does not rust. It also is easy to clean... which is a great side effect.

Handling the PWS MK214, I immediately noticed just how TIGHT the fit was between the upper and lower. Not only tight, but beautiful as well. The lines are amazing, and the rifle just begs you to hold it and look at it. The uppers and lowers are made from billet 7075 aluminum under a variance per PWS specifications.

These are production rifles, so they chose quality products for accessories... like the BCM Gunfighter charging handle. According to PWS (and I share this train of thought), it is the best one on the market, so it was a simple decision to make it an OEM part on the PWS rifles. They also outfit the rifle with MAGPUL MOE pistol grip, and a MAGPUL MOE stock. These are both cost effective on a production rifle, and they work. Sure, they could outfit the rifle with a VLTOR, or a more expensive MAGPUL stock... and throw a MIAD on there, but it would drive the cost of the rifle up. I like the fact that they did not put a standard A2 pistol grip, or a shoddy M4 style stock.

The rifle also comes with the MAGPUL MBUS flip up sights. These sights do work... but, IMHO, I don't care for the sight picture. However, this is better than just coming as a flat railed "Optics Ready" rifle. At least, you can still shoot the rifle, while you are waiting to install optics. Right?

Now, the MK2 series rifle comes with the FSC30. I spec'd this rifle with the PRC. The difference between PRC and FSC30 is as follows:

The FSC30 is the .30 caliber version of the PWS Flash Suppressing Compensator (FSC) series of muzzle devices. It is designed to provide superior compensation combined with enough flash suppression to keep the flash out of your optics and line of sight. I have used the FSC556 on the MK114 and the thing just flat works.

The PRC, (Precision Rifle Compensator) is a specialized compensator that is designed to reduce as much felt recoil as possible in order to allow the shooter to maintain an accurate sight picture of the intended target. The compensator is also wider on the bottom to reduce ground signature when firing from the prone position. This comp also reduces muzzle flash substantially over the FSC... so not to disturb your sight picture when firing in low light situations.

I am heading out for TDY tomorrow, and will be gone a week. Please stay tuned for some excellent testing on this fine rifle. I will also take some macro shots of this rifle, and post them for your review. I want to show how the bolt is finished, the bolt carrier, the gas piston system, the rails, and try my best to capture the attention to detail that this rifle has been given.

Stay tuned... and stay safe!
 
Re: PWS MK214

Oooo, sounds intriguing. Any chance you might be back out towards the "beaches" any time soon? I'd love to look it over. Maybe molest it a little with my paws, it looks gorgeous from the start. The have put some serious research into these rifles, huh? Great to hear from ya again Mack!

Can't wait for the write up on this one.
Hows the Mk114 getting along??
 
Re: PWS MK214

I will be out there in a week or so. Trust me, you will get to shoot it.

The MK114 is as good as the day it came out of the box. Actually... better! But, this is all about the MK2... can't wait to see what she can do.
 
Re: PWS MK214

DMack,

I am a new poster here at the Hide, been looking for a long time and let me say I really enjoy your reviews....you do a great job and very thorough.

Really interested to hear more about the scope, I just ordered a USO SN-3 for my LMT MWS and Jason took my order, and like you said, he was great to talk to....knew his product, now the 8 week wait. Your mount looks like an ARMS, is that correct? I am still undecided on the mount I will go with...

77
 
Re: PWS MK214

77...

About the optic of choice here... I have two SN3 TPAL optics that are both spec'd identical. I have the 1.8-10 with EREK, and left hand windage, and a 3.2-17 set up the same way. The 3.2-17 has windage stops but the other one does not. The windage stops allows me to get 5 MILS on either side of zero.

Here is my thought process on glass for this rifle. Most Law Enforcement Sniper Teams that I train, are very well equipped. They have very nice rifles, and very good glass. However, they are running 26" barrel bolt guns, with glass that averages 5-22 power. Most are running Leupold or NightForce, so I get to show off some US Optics products and have some name recognition for the company. Now... back to the glass. For this "short" barreled MK2, My accuracy needs are easy. Cold bore "T-Zone" at distances from arms length out to 200 yards. Will I shoot further than that? Absolutely. But, I have rifle grade reactive steel that I use at unknown distances out past 200. I have yet to make up my mind which scope I will use on the MK2.

Most "call outs" that a Law Enforcement Marksman will respond to, will be 100 yards or less. So, let's just say, you are lying on a rooftop in a barricaded subject scenario, or a hostage scenario... and you are able to close the distance to target, down to oh... say... 65 yards... and I am running a 26" barreled rifle, with a 5.5-22 power scope... even at 5.5 power, my field of view is very narrow. Part of my job as a Marksman, is to gather Intel for the entry team. So, am I over glassed? That is a topic of debate. I will use both on this rifle, to see which fits it's intended purpose better. Most likely, I will run the 1.8-10 on the MK2. As for the mount... this is an ARMS mount, and the jury is still out on that. I have several different mounts to choose from, so stay tuned, and I will include the pros and cons of each.

The glass quality in the US Optics have been discussed on this forum in amazing detail. It is the general consensus that it is definitely a top tier piece of equipment. I am a FFP shooter, because no matter where I am in the power range, my reticle subtends accurately.

I use a MILDOT reticle with .1 MIL turrets. This is what I am trained on, and this is what I can range with quickly and accurately. When I have a team training with me, I take them back to basics. Laser Range Finders stay in their bags... and I get them to work on converting MIL to MOA, and also using their reticles for ranging.

Part of my review with this MK2 will be some optics drills. I have a few different takes on the "box" drill, and "dot" drills that we all know and love. However, I didn't intend this to be a review of the glass... since there are fellas on here, that do a MUCH better job reviewing optics than I can do.

I chose to use US Optics, simply because I have used them down range. I find their products to be extremely well made, have superior glass quality, and the ability of their turrets and erectors to track properly and accurately to perfection. I also love the fact that if I ever need a hammer, I can use one of these scopes to drive a nail. *kidding*

Well, time to load up and head off. I will be on TDY for a bit, but I am very excited to return and get some testing done with this rifle. As stated, it will most likely change configurations a few times until I find the sweet setup. My endstate, is to find a rifle that will fill a niche in Law Enforcement as a heavy hitting door kicking rifle, as well as an accurate, absolutely dependable precision style rifle that a SWAT Sniper can use in multiple roles. I wanted to do it with an off the shelf, production style rifle, and the long stroke gas piston design of the PWS has made me a believer... at least in the MK1 series rifles.

I really can't wait to shoot this thing!!!

Cheers!
 
Re: PWS MK214

DMack

I will monitoring the progress of your MK2 testing. I am currently waiting for a MK216 to arrive. I currently run a MK110 on my sbr lower. Has been working great. But just not sure of the reliability of the MK2. I've searched the web from one end to the other and have found just a couple of articles and videos. But nothing substantial. I know the gun will work well but just like any "new" model there might be a thing or two to work out. Thanks again for taking on the task and keeping us informed.
 
Re: PWS MK214

Big D...

As stated, I am TDY right now, unable to do any shooting with this platform. However, upon my return, I will be picking up and running with it.

I have discussed this platform with Todd at PWS to GREAT lengths. He has been running a MK212 in Three Gun for a while now, with zero reliability issues. The MK214 that I have is a production version, with just a few changes that I have made (Trigger, Hand Grip, Glass, etc...).

I have high hopes for this rifle... so, we shall see!

Cheers!
 
Re: PWS MK214

Ok... I am back from TDY now, ready to dive into some testing on this rifle. I am processing some macro pictures of the rifle, to add tomorrow. I will also be out at our City Range, and plan on getting a five shot average through my Chrono with 168 Grain Federal Gold Match, and a five shot average with 175 grain Black Hills.

As of now, I have the 3.2-17x USO SN3 mounted on the rifle. It's a toss up to where I leave this optic on, or mount the 1.8-10x on it.

Bipods are what I am researching now. Most likely, I will use a set of Atlas V8's if I can find some. I need the ability to cant the rifle, and track movers. Of course, I never go anywhere without my "tactical frisbee"...

I still need to change out the MOE handgrip to a MIAD, simply because I have large hands and the MIAD fits my paws better. This is purely a personal choice.

I will be running the VLTOR EMod stock for now, since my discussion with Todd at PWS shed some light on how the "dead blow" buffer / spring / carbine buffer tube works handily with the Precision Rifle Compensator. I tend to listen when he tells me something. Being a short barreled rifle, and a piston gun, I wanna tame as much recoil as I can for accuracy sake. I was considering adding a fixed stock, like the Magpul PRS, but I do like the ability to collapse the stock and make the short rifle even shorter.

Stay tuned... more to follow.
 
Re: PWS MK214

Sling,

I like the Blue Force Vickers for my setup like yours. Or the TIS cuff.

I found that both slings work best for what you are talking about.

Scope mounts: I like the Bad Ord 22 MOA rail, with low rings, this lets me go from a bolt gun mounted rifle to a AR10/15 without adjusting the ring position on the scope.

The bolt guns I use have a 20MOA base, and the 22 MOA base with its higher line of bore / line of scope axis the extra 2 MOA is lost. My POA/POI shift is less the .2 MIL

Just some of my notes in this setup.

John
 
Re: PWS MK214

Oh,

One more thing, I went with the Vortex Sparc and the Daniel Defense 1 O'Clock Offset Rail with a 25yd ZERO.

Works great for walking to and from the trunk and ready up drills.

John
 
Re: PWS MK214

John,

It's interesting that you mentioned the Vortex Sparc and the One O'Clock rail... I was playing around with that tonight on the MK214.

I have a One O'Clock offset rail mount, that's set up for a Dr. Optic red dot... But, I think I like the SPARC set up better.

With this rifle being used as a Tactical Precision rig, having a red dot will expand this rifle, and act as a combat multiplier.

As stated, thanks for the input... it's great to see that I am not the only one thinking on these lines. Once I get the accuracy baseline, and some chrono results, I will move on to barriers and then on to shooting some steel at different ranges.

I also plan on running this rifle at close-up and personal distances... and the SPARC will fit that role brilliantly. It's definitely a cost effective solution to the T1.

Gonna give that a go.

Cheers,

Darren
 
Re: PWS MK214

DMack,

One point of training.

With the Sparc; ZERO it as the same ZERO you guys use for your entry guns.

this way the holds are the same for the short stuff.

Hair line and all.

This cuts your training time down. Also the high mount I found works best with the off axis tilt.

Once you get it ZERO'ed, shoot a CQB qual with the dot off, I only dropped 10% do to the Sparc being at the forward most point on the handguard and the little window.

Oh,

One more thing, Streamlite TLR-1 mounted at the 12'oclock with your sun shade off is killer for night fire.

John
 
Re: PWS MK214

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: oneshot onekill</div><div class="ubbcode-body">This "ISONITE" sounds like a similar finish to MELONITE. Is there a big difference? </div></div>

Oneshot...

Honestly, I don't know Brother. I have discussed the process at length with Todd at PWS, and all I know is that it hardens the surface, and gives excellent wear qualities. It is also very controllable as far as thickness and such... where hard chroming can lead to some minute irregularities.

I know that Spikes Tactical uses the Melonite procedure... is it the same? I have no idea. What I can tell you is that the Isonite coating that PWS puts on their stuff is tough as nails. I have over 9k rounds logged on the MK114 that I did a write up on, and with my bore scope, I have zero detectable throat erosion, or any irregularities in the bore.

Todd told me that they used to "microslick" the BCG's and such, but with use, the finish would rub off on some of the surfaces, and cause a cosmetic issue to some users. It had zero effect on the treatment of the part, but did show some sign of wear. So now, PWS does the Isonite treatment on all of the parts... BCG, Gas Block, Barrel, Chamber, etc...

Every person that I let use these PWS guns comments on how "slick" the action feels. Almost like the action is on bearings. This MK214 will not be seeing any fully automatic fire like my MK114 and MK110 does, but I can attest that the Isonite treatment makes the weapons stand up to heat like the Melonite treatment does for Spikes and their gas blocks / gas tubes.

It may be the same, it may be close. Which is better? No clue.

Cheers,

Darren
 
Re: PWS MK214

Ok, here comes some pictures. I do not claim to be a photographer... and I was doing this with no lighting or tripod. So, bare with me...

Here she is as she sits now. Kind of silly looking, but as stated in my opening, I am going to be using this rifle for other than what it was designed to be used for.

MK214a.jpg


The upper and lower receivers are both billet. PWS is going to move to forgings once the tooling is squared away. Forging is lighter and stronger... but, billet is sexy, and TIGHT!!!

MK214b.jpg


MK214d.jpg


MK214e.jpg


MK214f.jpg
 
Re: PWS MK214

The rails are proprietary... and anchor on the front gas block by two allen head screws.

MK214g.jpg


Near the barrel nut, they are held on by a snap ring.

MK214h.jpg


I like this feature because if you bang up a rail, and need to replace it, you can do so individually, without having to replace the entire tube.

The top rail butts up against the upper receiver, leaving a nice 45 degree bevel. I have never had an issue with this causing mounting problems with optics on my MK1 series rifles.

MK214i.jpg
 
Re: PWS MK214

ALL PWS rifles MK1 and MK2 come with Bravo Company (VLTOR) "Gunfighter Mod2" charging handles. This is the "mid" sized one. I prefer the MOD3 or the large latch... but, that's my own preference. The medium is a nice middle ground, that catches on gear less, and still allows easy access even with optics on the rifle.

MK214j.jpg
 
Re: PWS MK214

As stated, the upper and lower receivers are billet... here's a shot of the upper with rail, and forward assist in view... nice!!!

MK214k.jpg


This charming beauty is the PWS PRC (Precision Rifle Compensator). This baby is amazing. It has an extra gas port, over the FSC30 and Todd told me that the recoil reduction of the PRC compared to the FSC is substantial. He test fired my rifle in the dark, to see how the PRC would effect muzzle flash... because he was worried about me using optics on this in low light. With the PRC installed, muzzle flash was a non issue with his Lupy MK4 installed. I chose this over the FSC, simply for the role in which I will use this rifle.

MK214l.jpg
 
Re: PWS MK214

Here is a view of the gas block as seen from the front of the rifle. There are many grumblings on the net about how PWS does not "free float" their hand guards / tubes / rails, or whatever you wish to call them. There is a reason why, and I will show this in a bit... as viewing the picture, the top rail of the rifle, is indext to your right... the rifle is lying on it's left side.

MK214m.jpg
 
Re: PWS MK214

Ok, here is the barrel nut end of the rifle, with the rails removed. You can see the provisions to hold the end of the rails in place, and the rails are held on by a nice snap link. They are sort of fiddly to remove, but if you have some snap ring pliers, it's a non issue.

MK214n.jpg


Here is one of the rail sections...

MK214s.jpg


Here are all four, with the longest rail being the top rail...

MK214t.jpg
 
Re: PWS MK214

This is the gas block. Note how BIG the gas tube is? This is so the piston can be large enough to function without any return springs. PWS "could" have used a free float tube, but the design of the long stroke piston, and it's floating piston / operating rod deemed it necessary to create rails like this. That way, the sight plane on the upper rail is exactly like every other AR out there (MILSPEC) and you can use the billion and one AR accessories out there in the world, and they mount on the rifle just like they would on any other rifle.

MK214o.jpg


Half way down the gas tube, about mid barrel... there is a hole where the gas vents downward. As the piston clears the hole, the gas is blown outward... and not into the chamber or your eyes... if you are a lefty. There is also no gas blown forward. I have put over nine thousand rounds through my MK114 thus far in documented training, and over three thousand in my MK110 and never had an issue with the carbon or gas hitting the barrel.

MK214q.jpg


 
Re: PWS MK214

Here is a view of the complete upper, minus rails... to give you an idea of how beefy this thing is. Pictures do NOT do it justice...

MK214p.jpg
 
Re: PWS MK214

Here is the best I could do with the chamber.

MK214r.jpg


This is a 7.62x51 NATO chamber, that is .003 from "minimum specs". So, in other words... it's cut on the "tight" side... The barrel is a 1 in 10 twist, stainless steel Bergara Barrel, that has been Isonite treated.
 
Re: PWS MK214

Here is a bird's eye view down into the lower receiver. The trigger is a Geissele SD-E.

MK214u.jpg


The magwell has a generous bevel, and the MAGPUL PMAG is a breeze to seat, and unseat.

MK214v.jpg


This is the front view of the magwell... nice touch...

MK214w.jpg
 
Re: PWS MK214

Here is a comparison with the MK2 bolt carrier group, compared to the MK1.

The MK2 is on top, the lower one is my BCG out of the MK110.

MK214x.jpg
 
Re: PWS MK214

There is roughly 18" of rail space on the upper rail section... counting the rail on the upper receiver.

MK214y.jpg


The rails are about two inches wide, across the rifle from left to right... makes for a narrow grip. That's why I like to use ladder rail covers, and will be installing them as soon as they arrive. The MK series of rifles ship with three rail covers, but they take away from the thin profile of the rails.

MK214z.jpg


From the top rail to the bottom rail, there's about two and a quarter inches. So, you can get an idea how thin the front end of the rifle is.

MK214zz.jpg
 
Re: PWS MK214

Ok, more to follow. I worked the 4th of July on the beach, and we didn't get to chrono the rifle. In fact, I have yet to shoot it. When I do get to the range, more pics and video to follow.

If you have any specific questions, or things you would like to see on this rifle... please feel free to ask.

Again, thank you to the Hide for allowing me to post this review.

Cheers,

Darren
 
Re: PWS MK214

Hey DMack, thanks for the great review of the PWS products. It's funny how this amazing weapon system is still not widely know in the mainstream Firearms world.
I took my MK116 into a local Gun Shop today (to show off) and the whole place stopped as these guys marveled over the build quality and long stroke gas system of this weapon. I think once the word gets out, Mr. Tuttle is going to be very very busy.
As far as your writing sir, it is equal to, if not better than any firearm publication I regularly read, and is backed up by your credibility as an everyday Tactical trainer, and a Veteran Operator....
 
Re: PWS MK214

HDK...

PWS advertises that the MK214 will average 2500 FPS with the 168 grain Federal Gold Match. That is the round I will baseline with. I have not seen this yet, but I have yet to find them steer me wrong in technical questions I have asked.

If I can pull 2500 FPS, or better... that will give me enough velocity to defeat windshields and such... and keep the flight trajectory on par with what I intend to do with this rifle.

As it stands now, I am planning on doing some initial chrono testing tomorrow. If I am unable to get to the range tomorrow, I will definitely be out there next week. I will be down in Palm Beach County doing a Mobile Training Class. This rifle will be going with me, so she will get a work out next week for sure.

I appreciate the interest everyone. I too, am anxious to see what this rifle can do. It sure is built well.

Cheers!

Be safe out there.
 
Re: PWS MK214

DMack

When you work the charging handle, does it feel sticky? My Mk110 upper was a little sticky at first. I had some wear on each side of the charging handle at the 90%. Maybe the isonite? Not sure. I've got about 250 rounds thru it. Taking it out this weekend and going to run another couple of hundred rounds. Seems to be "smoothing out".

Do plan on trying any surplus ammo? I'm going to be trying out some German DAG. Worked well out of my last AR10. Will be interesting to see how it groups.

Adios for now!
 
Re: PWS MK214

Big D, I sent you a PM in reference to this. I outlined what I use for lubrication. I just didn't want to get off topic and into a debate with people about what the best oil is for rifles. Everyone has their own experiences...

I know the gritty feeling you are speaking of. I can tell you that every one of my rifles felt like that when I first got them, but after lubing them up and working the action... as well as shooting the snot out of them, they are super smooth.

Cheers!

DMack
 
Re: PWS MK214

Well, I was going to do some chrono work today, but the rain kept me from doing anything of the sort. I did change the grip to a MIAD with the large B3 backstrap. It just fits my hand better. I will be down in Palm Beach this coming week, and will definitely get some range reports during my class down there.

I will just use my Harris Bipods for now, but I have decided to run Atlas V8 bipods on this rifle. I just have to wait for them to ship.

Have a wonderful weekend everyone, be safe.

1*
 
Re: PWS MK214

I got the MIAD grip on, and mounted my Harris Bipods on until I get the Atlas V8's.

The rifle is solid, balances well, and with the harris bipods and VLTOR EMod, it has the perfect mount for me. Now the only thing left is to start shooting it.

MK214a-1.jpg


I will change out these MAGPUL rail covers for some low profile ladder rail type covers. I prefer the ladder covers more.

MK214b-2.jpg


The MIAD just fills my hand better. The billet lower has a curved trigger guard, so you only have to get the MIAD Basic Kit to replicate this. The feel is night and day better than the MOE.

MK214c-1.jpg


Harris Series S bipods on an A.R.M.S. QD mount... I like it.

MK214d-1.jpg


Here is a couple of shots of the Precision Rifle Comp. (PRC)

MK214e-1.jpg


MK214f-1.jpg
 
Re: PWS MK214

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Cegorach</div><div class="ubbcode-body">Do you have any idea how these run with a supressor? How to they compare to short stroke designs in that department? </div></div>

I have not run the MK214 with a suppressor, but the MK1 series weapons run like tops when suppressed. The MK110 and shorter will have a high cyclic rate while suppressed and run on full auto, but semi auto, PWS has perfected the short barreled rifle. The Diablo runs like a Swiss Watch suppressed.

The LONG stroke design of the PWS MK series rifles, are designed similarly to the AK platform. Instead of having a flat portion on the area that would be the gas key, on a DI gun, the operating rod is attached to the "gas key" and has the piston mounted on the end of the operating rod. The piston floats, and is captured by an interference pin.

Here is a view of the bolt carrier group, and operating rod / piston... the top is the MK2 BCG, the bottom is the MK1 BCG.

MK214x.jpg


Here is a close up of the piston that is attached to the operating rod. This entire unit rides in a gas tube, and has no springs to fail.

newrifleandranger021.jpg


A short stroke piston design, has the gas pulse "push" the piston / operating rod back, and it "slams" into the machined surface of the gas key... thus using kenetic energy to drive the bolt carrier group back into the buffer tube. Early on, this "slamming" effect caused carrier tilt on some rifles.

The Short Stroke design also relies on springs to bring the operating rod back forward. These springs are susceptible to high temps, and can also go into harmonic resonance issues if the cyclic rate increases past the spring's ability to handle it.

There are no moving pieces to fail in the PWS piston design. I was NEVER a piston conversion fan. But, they designed this piston platform, to fit within the confines of the AR dimensions. The PWS Piston rids the gas pulse to the rear, never "slamming" into the bolt carrier group... or tapping it, pressing it, or whatever they call it. Once the PWS piston passes the vent hole, the gasses are vented, and then the buffer spring pushes the BCG and Operating Rod / Piston back forward.

I am no engineer. However, the system works, and it is ultra simple.

The following is straight cut and paste from PWS. After running these guns hard for a while, I can attest to this.

"The PWS proprietary operating system utilizes an operating rod that is attached to the carrier and a floating head piston that is attached to the operating rod. The MK1 series is built to be a true combat carbine. With no unnecessary gas adjustments and only one moving assembly, this is the most rugged, simple and versatile piston operating system available."

I spoke with someone that was having issues with the PWS MK110 running full auto while suppressed. The cyclic rate ran very high... this could be due to the back pressure of the can, weight of the buffer, spring combo, etc.

AS for the MK2 series in 7.62 I don't know. The next time I speak with PWS, I will inquire into the reliability running them with a suppressor attached.

I do believe that Todd has run his MK212 in Three Gun for over a year now, and he runs a can on his without issue. I will ask, just to make sure...

I don't plan on running a can on this rifle, that's why I went with the PRC brake installed.

Check back, and hopefully, I can have a little bit of insight for you...

Cheers,

DMack
 
Re: PWS MK214

Awesome, thanks a lot.

I have been reading all of the updates you have been posting with the two PWS systems and they sound very well thought out and functional. I will be in the market for a 5.56 carbine here in the near future and am going to give them serious consideration.
 
Re: PWS MK214

Cegorach... I have run my MK1 series rifles very hard. I find that the MK114 is probably one of the best carbines I have had the pleasure of using to date. Have a long hard look at it... you will be glad you did.

For the money, I find them hard to beat.
 
Re: PWS MK214

I weighed the PWS MK214 today on our digital scale before I left for Palm Beach. Here are the components of this rifle:

PWS MK214 with PRC added on the barrel
Geissele SD-E Trigger
KNS Pins (installed at PWS)
VLTOR EMod Stock
Magpul MIAD grip
A.R.M.S. QD Harris Bipod Adapter
Harris Series S bipods
Three Magpul plastic rail covers
A.R.M.S. 30mm QD optics mount
US Optics SN3 T-Pal with EREK 3.2-17x
US Optics Sunshade with kill flash
US Optics flip up covers

This gives you an idea of the kit I have added to the rifle.

Fully kitted as listed, it weighed 12.9 pounds.

I took the rifle off, and put it back on the scale three times to verify the weight.

Heavy but not crazy bad. The rifle balances well.
 
Re: PWS MK214

I finally got out to the range today to fire my MK214. It's a <span style="font-weight: bold">really</span> nice rifle to shoot; the recoil is incredibly tame, my 12-year-old had no problem capping off 5 rounds in a row and proclaimed it recoiled "like a solid push, but not a blow". I found it heavy but not unmanageable to fire offhand, and really easy to stabilize on a bench rest.

Unsurprisingly, it ran like a top; no issues of any kind with the rifle.

I'm looking forward to your next installment, D!
 
Re: PWS MK214

BattleAxe...

When we get together, I will let you run my MK114 and my MK110 and let you see how well they run.

Benjamin... so glad to hear! I have not had the chance to get mine out and put the first round through it. Since you have one, you can rely on my Chrono numbers and such. The only difference between yours and mine, would be the glass on it, and the trigger. That's why I chose to do an off the shelf version.

I'm stoked!

Ok, off to training. Range day is Wednesday. I have my Chrono with me. I want to get muzzle numbers as well as 100 yard numbers.

Stay tuned!

Darren
 
Re: PWS MK214

Any updates on the MK214?
I seen you were gonna try to chrono some rounds Wednesday.
I'd like to see what she does. What ammo you running by the way?

Hope you're enjoying yourself out there in this brutal Florida summer!
grin.gif

Keep cool, and don't let yourself get overheated.
I know how rough it can get in the summer! It was 95 today at the
beaches,even with a seabreeze.
eek.gif
 
Re: PWS MK214

We had live fire yesterday, but had Delray Beach SWAT come out and run the course with the team I was teaching. They have new Springfield TRP Operator 1911's and... well... the day was mostly spent doing pistol and carbine work.

We had "wet bulb" temps up in the 110 to 112 degree range, and it was HOT. HOT HOT HOT.

I have not done any chrono work yet. When I get back to North Florida tomorrow, I will set some time up to come to the range there in the City.

I want to get a good muzzle chrono and also out at 100 yards. I will start off with 168 grain FGMM and work out from there. I have some 168 grain Black Hills, and some Hornandy TAP.

You will get to fire her, trust me.