MK 12 Picture & Discussion Thread

[FatBoy]

As crazy as it sounds, I have started using N140 in one of my rifles just because of availability and (the amazing part) price. Who would have thought VV would be the reasonably priced powder.

Picking up a gas tube, LPK, pistol grip and maybe a stickler today. I have an Aero lower and Geisslle NM trigger as a place holders, and my Upper recover should be here tomorrow. At that point, all the upper parts are going to my smith to build out my NSW RECCE.

If I’m going to just range queen it, it’ll wear my 2.5-10x24 NXS. If I’m going to compete with it, and NX8 1-8 at first, then maybe a mk5 HD 3-18 with a piggyback up top.

 

[NHPiper]

You have a favorite load for 69s or 77s? I’m about to start loading my daily ammo off a 550, so I’m moving to 8208 and TAC.

I have run 23.2gr 8208 behind 77SMK and up to 23.8gr. At one point, the 23.8gr gave me some pressure signs, but I loaded the bullets slightly longer and they went away. It's probably pretty close to on the edge, but delivers consistent sub 3/4 MOA groups and has performed out to 800+ yards from the Mk12 Mod 1.

I would start at 23.2gr and work up.

 

[tarheel7734]

Anyone know I'd the a.r.m.s. 22 high rings will allow a 50mm objective to clear on a mk12 mod 0? I believe the height is 1.450". I have a 1.53 on my mid 1 and it's fine.

Working on a mod 0 and trying to plan the optics and mount. I can't bring myself to use an old outdated optic, so I am looking at the nx8 2.5-20 like on my mod 1 or a nx8 4-32.

 

[Dogtown]

Yeah, pretty sure you'd good to go on that.

 

[FatBoy]

Oh shit. Wasn’t sure I was gonna find one of these…

 

[FatBoy]

Mail man just dropped the last of it. All I’m missing is another PRI Gas Buster, but I’m not 100% sure I’m going to use it as I plan on using this for Run and Gun, so a smaller latch helps keep the charging handle locked. (Think BCM gunfighter)

A couple weeks and there should be a new NSW-RECCE~ish rifle on the range.

 

[tarheel7734]

Some parts that came in for my mod 0 build.

My stripped h&r m16a1 lower is at my local shop waiting to get cerakote. Upper is on order. I'll need an optic, rings, bipod and bipod mount as well as a case.

 

[FUNCTIONAL]

And she's complete. First 50rds down her today. She likes the same load for both a 77smk and 75 Hornady hpbt. It's such a nice gun to shoot. So soft and the tone is excellent. If I tightened up it would easily keep up.

Don't worry about that really high one... that was the first zeroing shot that was way off...

 

[FUNCTIONAL]

Anyone come across this? I have the gas block spacer... a second may do it (if my gas hole line up) . Thoughts?

 

[tarheel7734]

Parts are starting to look good for a mod 0.

 

[VargmatII]

I was at the range this past saturday. Shot some PMC X-Tac 77 grain at 100 and 300 meters. Naturally I was running my MK12 mod H-ish build with the WOA SPR barrel.
I only had time for one 10 round group at 300, but it measured 88mm C/C. So sub MOA, and I am sure I can do better. But I was running out of time and was a bit stressed... Anyways. Very happy with the build.

 

[Maverick3009]

Here's my setup, Centurion Arms Mod 1. I strayed from the proper glass and went with a NF ATACR 4-16x42

May swap out the A2 stock for a LMT DMR, haven't decided yet. Also still need to get my AEM5/OCM5.

 

[FatBoy]

RECCE ~ish build is one step closer. Added a bit of girth to the chamber area. Gas manifold and brake will get pinned after we shoot it off my SBR lower and validate it’s gassed correctly.

 

[ilikebmxbikes]

Some OG barrels

 

[FatBoy]

From 100y zero, 5 MILS flat to 600y with a 69gr HPBT RMR over 23.3gr 8208XBR. Not much ass when it gets there, but it’s getting there. I think This is going to be very good shooter when I get around to grouping it.

 

[tarheel7734]

These came for my mod 0 build.

 

[FatBoy]

One more to go…

 

[tarheel7734]

More parts came in for my mod 0. Supressor not cleared jail yet..

 

[EUBANKS]

View attachment 8484031

love the top one!

 

[Dogtown]

Feels a lot more OIF III now...

 

[FUNCTIONAL]

Took the mk12 out to 900 today for the first time. Didn't do a mk262 clone but running a 77smk at 2680fps to match the 168gr 308 turrets. Ran out of elevation at 800 but she holds fist sized groups out to 800. Holding over at 900 I had hits on a full ipsc and couldn't connect at 1k. Time to finally clean her and see if I can squeak any more accuracy with seating depth and crimping.

Here's a few action stills from a video.

 

[longshot2000]

For what is worth, we just released our full Mk12 Mod1 rifles . We have previously released the full deployment kits for the Mod1 and the Mod 0. Tonight, we reduced the price on the Mod 0 rifle and deployment kit, and introduced the Mod1 rifle and also released some KAC RAS rails for the Mod 1. We have options for the rilfe with a suppressor and Leupold optic as well.

 

[The Durk]

Upgraded to an A1 stock, and finally picked up an OCM5. Only thing left I really went to do to this rifle is upgrade to a Leupold MK5 scope. With the can on I’m getting consistent .5”-1” groups which I’m ecstatic with. She took top gas gun at Peterson Cartridge Challenge 2 years ago.

 

[dgheriani]

Upgraded to an A1 stock, and finally picked up an OCM5. Only thing left I really went to do to this rifle is upgrade to a Leupold MK5 scope. With the can on I’m getting consistent .5”-1” groups which I’m ecstatic with. She took top gas gun at Peterson Cartridge Challenge 2 years ago. View attachment 8546633View attachment 8546634View attachment 8546635View attachment 8546638

Nice rig! What optic are you currently running, is that a 3-18 Strike Eagle?

 

[bf2junky]

 

[The Durk]

Nice rig! What optic are you currently running, is that a 3-18 Strike Eagle?

Thanks! For the match I won, I had my S&B PMII 5-25 on it. Currently it has the newest generation of the 3-18 strike eagle that I took off my Rimfire PRS rig.

 

[dgheriani]

Thanks! For the match I won, I had my S&B PMII 5-25 on it. Currently it has the newest generation of the 3-18 strike eagle that I took off my Rimfire PRS rig.

What're your thoughts on the 3-18 Strike Eagle? I'm building a new .223 gas gun that is definitely not a Mk12 clone but same concept (precision AR but for field/practical use, not a bench/target/match setup). 20" Krieger Hbar and CMT arca rail. As I assemble the bits and pieces I've been debating what optic to use. Plan is to try 3 I have on hand (G3 1-10, PST G2 2-10 & LHT 4.5-22ffp) and see which one best fits the use case (which is engaging targets out to 700ish yards in field conditions where the targets can be harder to resolve, no good backstops, etc). They all have downsides: 1-10 gives up a bit on 10x, 2-10 has exposed non-locking turrets and meh reticle, the LHT is probably closest (the low end isn't critical since I'll be running an offset rds) but on paper I like the features of the 3-18 SE (mag range, length, weight is ok, zero stop for elevation, capped windage, reticle and illum) but I always kinda balk at any of the made in PRC stuff...

 

[thaflash_la]

A very “ish” rifle, inspired by the MK12 and RECCE. Some form-over-function extras, because California.

I was originally very disappointed with this rifle because the Faxon match barrel didn’t like any ammo. I think I had mistakenly not torqued something down because after I added the OCL brake it started shooting great. I still want to swap the barrel with a PRI Douglas and I don’t like the MDT stock at all.

 

[VargmatII]

I finally added some spraypaint to my build, I think it turned out great.

 

[tarheel7734]

Update on my mod 0. Still waiting on my can, but my nx8 arrived today. As soon as I get my new a.r.m.s. #32 for my mod 1 I'll post pics of both.

 

[Trigger Monkey]

Update on my mod 0. Still waiting on my can, but my nx8 arrived today. As soon as I get my new a.r.m.s. #32 for my mod 1 I'll post pics of both.

View attachment 8549679View attachment 8549680View attachment 8549681

 

[tarheel7734]

Here they are together. My fde aem 5 still not cleared jail, so I left my black one off.

 

[FatBoy]

Starting a Mod1 upper. Using a Cage Code Colt my wife got me for Christmas. Might do a full rifle.

I got my brake and collar today. I have never seen one marked Ops Inc before. What are the chances that this is original?

 

[buffalowinter]

USSOCOM Mk12 Mod 0 Special Purpose Rifle
5.56, NF NXS 2.5-10x24, Allen Engineering Suppressor

Clay targets at 100 yds...needs about 3 clicks right

Colt m16a1 lower
Colt upper
Brownell's Mk12 SPR 5r rifled barrel
Allen Engineering brake and collar for Allen Engineering suppressor
Gas Buster charging handle
M16a1 original surplus stock
Precision Reflex carbon fiber handguard
Precision Reflex gas block w/ front sight
Swans #40 buis
Colt bolt
Harris Bipod
m16a1 grip
Nightforce 2.5-10x scope w/ swans rings
Vortex red dot

 

[Trigger Monkey]

 

[NHPiper]

USSOCOM Mk12 Mod 0 Special Purpose Rifle
5.56, NF NXS 2.5-10x24, Allen Engineering Suppressor

Clay targets at 100 yds

Colt m16a1 lower
Colt upper
Brownell's Mk12 SPR 5r rifled barrel
Allen Engineering brake and collar for Allen Engineering suppressor
Gas Buster charging handle
M16a1 original surplus stock
Precision Reflex carbon fiber handguard
Precision Reflex gas block w/ front sight
Swans #40 buis
Colt bolt
Harris Bipod
m16a1 grip
Nightforce 2.5-10x scope w/ swans rings
Vortex red dot
View attachment 8577886

How does the Brownells barrel shoot? Do you know the blank?

 

[bf2junky]

Starting a Mod1 upper. Using a Cage Code Colt my wife got me for Christmas. Might do a full rifle.

I got my brake and collar today. I have never seen one marked Ops Inc before. What are the chances that this is original?

View attachment 8577879View attachment 8577880

You get the brake and collar from Centurion?

 

[FatBoy]

You get the brake and collar from Centurion?

eSilencers. I got my last one, for the RECCE from them as well and they were AE.

 

[buffalowinter]

How does the Brownells barrel shoot? Do you know the blank?

The barrel is excellent, and I shoot run and gun with it out to 600 yds. Watch the video in my post above, it's only 100yds, but the gun shoots, even with the suppressor.

 

[TXRattler07]

I had no intention of picking up the suppressor when I built this, but this thread is what did it. I bought my OCM from esilencers. Shipped to my dealer in about a week, had it approved in 5 days from submitting. Still haven't shot it as I'm still deciding on optics (I'm not looking for recommendations, thanks).

 

[5RWill]

Emailed Craddock to see if they're going to offer MK12 barrels in 22 arc...will update, possibly impulse order, etc.

 

[shooterman_zero17]

Just put an NF 2.5-20x50 F1 on it. Going to try for 1000 this weekend and see what happens.

 

[5RWill]

"The short answer is yes, the long answer is we have multiple dealings with 22ARC running AE suppressors - we are launching a direct mounted barrel so you don't need their muzzle device or taper mount collar - and we are also offering an 18 Mk12 barrel -

Those are launching on the RTR line soon - probably late February if it was my guess"

From Craddock for MK12s if anyone was interested like myself.

 

[Dogtown]

After far too long, got to shoot the old PRI Mod 0 with an AEM can. Completes the early GWOT memories.

 

[tarheel7734]

My fde can finally got approved today.. I just need to get foam, cleaning rod, paperwork and a bore guide for my mod 0 to complete it.

 

[FatBoy]

My fde can finally got approved today.. I just need to get foam, cleaning rod, paperwork and a bore guide for my mod 0 to complete it.

Very nice!

 

[Charger442]

damnit, i need to rattle can mine.

 

[TurdFerguson]

How good are the newer PRI uppers? Wanted to grab one as a shooter. Not a collector.

 

[tarheel7734]

How good are the newer PRI uppers? Wanted to grab one as a shooter. Not a collector.

Build quality is pretty amazing. I have not had a chance to shoot it yet, but has same barrel as my mod 1, so I'm assuming it should shoot just as well.

 

[TurdFerguson]

Build quality is pretty amazing. I have not had a chance to shoot it yet, but has same barrel as my mod 1, so I'm assuming it should shoot just as well.

Good to know, how accurate are they to the originals? I see they have the same twist rate but I am seeing them pictured with newer and older styled hand guards.