.308 Extrator

[bfoosh006]

FWIW... All my PSA PA10's and PA65's use a short DPMS style AR15 gas tube length. Zero cycling issues.
Even with heavy buffer weights in all "patterns" ( DPMS 2.5", Armalite 3.25" and 308 rifle length 9.3oz buffers )
On top of that is they all use Adj. GB's ( SLR's ) opened 6 clicks from closed of the available 15 .
And Tubbs .308 Flatwire recoil springs in all the above recoil patterns.

That same DPMS pattern gas tube length is used by a lot of Large Frame AR manufacturers.... for many thousands of Large Frame AR's.

The Armalite length gas tube length might help, or it might not.
The Armalite 308 BCG also has 3 exhaust ports in the carrier, DPMS pattern BCG's have only 2 exhaust ports. That extra Armalite exhaust port helps with the longer Armalite gas tube "dwell time" and volume of gas.

And if the OP's firearm is overgassed... then the longer gas tube will contribute to that.

Did the OP ever post pics of the fired brass ? Just curious.

And just my 2 cents... but I tried the Heavy Orange and Red Sprinco recoil springs... they are plenty stiff, and caused noticeable muzzle dip when sending the BCG closed and when firing. The 308 Tubbs Flatwire was nowhere near as hard closing on the breach.

FWIW.... Tubbs measured the weights on some recoil springs.

A2 (old) - 7.6lb closed, 14.5lb open
A2 (new) - 9.1lb closed, 16.7lb open
Tubb Flatwire - 10.5lb closed, 16.3lb open
Tubb .308 Flatwire - 13lb closed, 16.7lb open
SpringCo White ? (standard) - 8.3lb closed, 16.3lb open
SpringCo Red (extra) - 10.5lb closed, 18.4lb open
SpringCo Orange (increased) - 13.9lb closed, 24.8lb open

 

[RUTGERS95]

FWIW... All my PSA PA10's and PA65's use a short DPMS style AR15 gas tube length. Zero cycling issues.
Even with heavy buffer weights in all "patterns" ( DPMS 2.5", Armalite 3.25" and 308 rifle length 9.3oz buffers )
On top of that is they all use Adj. GB's ( SLR's ) opened 6 clicks from closed of the available 15 .
And Tubbs .308 Flatwire recoil springs in all the above recoil patterns.

That same DPMS pattern gas tube length is used by a lot of Large Frame AR manufacturers.... for many thousands of Large Frame AR's.

The Armalite length gas tube length might help, or it might not.
The Armalite 308 BCG also has 3 exhaust ports in the carrier, DPMS pattern BCG's have only 2 exhaust ports. That extra Armalite exhaust port helps with the longer Armalite gas tube "dwell time" and volume of gas.

And if the OP's firearm is overgassed... then the longer gas tube will contribute to that.

Did the OP ever post pics of the fired brass ? Just curious.

And just my 2 cents... but I tried the Heavy Orange and Red Sprinco recoil springs... they are plenty stiff, and caused noticeable muzzle dip when sending the BCG closed and when firing. The 308 Tubbs Flatwire was nowhere near as hard closing on the breach.

FWIW.... Tubbs measured the weights on some recoil springs.

A2 (old) - 7.6lb closed, 14.5lb open
A2 (new) - 9.1lb closed, 16.7lb open
Tubb Flatwire - 10.5lb closed, 16.3lb open
Tubb .308 Flatwire - 13lb closed, 16.7lb open
SpringCo White ? (standard) - 8.3lb closed, 16.3lb open
SpringCo Red (extra) - 10.5lb closed, 18.4lb open
SpringCo Orange (increased) - 13.9lb closed, 24.8lb open

excellent post

 

[bfoosh006]

The GGG is gone damnit. Gone right down the shooting lane.

I used about 500 rounds of zqi. I had zero issues. It was not bad. GGG out grouped the zqi though.

That said - my rifle seems to shoot almost any same batch m80 at 1 to 1.5moa when inside 500m.

Agree - the OP seems to be after the lowest cost fix. Hell. An orange spring and the 5.5oz buffer may just fix his issue enough to make it run. $75 shipped to his door. Out and running. No gas block, no nothing. He is mechanically short stroking due to using a 3.25" buffer in a 7.00" tube. With full gas, even using the wrong gas tube may not be an issue.

That stated, I fully suggest changing at very least his gas tube and verifying the gas block port is "centered"(close as can honestly be) over barrel gas port.

All in - I am expecting he has something to share in about two, three weeks tops.

What year was your GGG Ball produced ?

I have some of both the production years , and the 2013 is far more accurate for me and my barrels. ( 43.5 grains of Ball Powder )

The 2015 ( ? ) Batch ... flat out was horrible in those same barrels. ( 45.6 +/- 1/10 of a grains of a ball powder )

FWIW... GGG Match ammo, 155gr, 168gr, 175gr SMK at TargetSports USA. "Decent" price for the current market.
https://www.targetsportsusa.com/ggg-308-ammo-c-2792.aspx

 

[Manic Mike]

Here is the last brass cartridge that got stuck in the barrel of the cycling challenged .308. It dropped right out, once I removed the cartridge jammed in against it. Since I live behind enemy lines in the Peoples Socialist Republic of California, I have to use the Hell Fire rear pin that locks the magazine in; this causes all sorts of problems when you need to drop a magazine or open the action with the bolt stuck partially open.
This is the round used- factory loaded 7.62x51 if it was identified correctly

Front view; there is a noticeable scratch that runs from a doink in the case rim all the way to the front
side view>

The scratch is evident in the side view and runs down to a damaged area of the rim pictured below

Side views; unmarked areas


The local reloading expert saw nothing wrong with new unfired cartridges and ventured an opinion that this was not an Over Pressure issue. Other than that, the answer was "Ammunition is my specialty, not the mechanics of the firearm"; honest answer. The Community Suggested gas block, buffer, spring and buffer tube on their way here as I type. I found AR15 Discount, DSG arms, learned about gas tube spacing and appreciated the video on the springs; moving forward on this with the communities advice. Thank you all; you saved me a bit of frustration, time and money!
Manic Mike

 

[rpoL98]

scratches on the cartridge case sides can be caused by:
sharp edges on metal magazine feed lips,
sharp edges on feed ramp barrel extension lugs,
on extraction, sharp edges on barrel extension lugs at the 3 o'clock position.

on extraction, the extractor drags the brass out of the chamber, and the brass is sliding over those sharp edges on the barrel extension lugs before it gets flipped out the ejection port.

 

[mtrmn]

It will never function anywhere near properly until that too-long buffer is out of there. That one item is probably 80% of your problem if not more. Once you get the right parts in there, THEN you'll be at a reasonable starting point for troubleshooting and tuning. Once you get the gun functioning at a reasonable level, only change one thing at a time while you're tuning on it. If you make several changes at once, you won't know which one fixed it or made it worse.

 

[Manic Mike]

The gas tube arrived today (DSG is impressively fast) and the buffer, spring and tube are due in on Friday. Is there any issue in polishing the edges on the barrel extension lugs and the feed ramps? I did polish the feed ramps a tiny bit. I am quite fond of polishing things and do so in my pistols. Just started looking at the rifles with polishing in mind. I am quite capable of taking them apart and polishing up the BCG, inside of the upper and trigger mechanism (no, I would not round off critical parts of the trigger!).
Manic Mike

 

[rpoL98]

Is there any issue in polishing the edges on the barrel extension lugs and the feed ramps? I did polish the feed ramps a tiny bit. I am quite fond of polishing things and do so in my pistols. Just started looking at the rifles with polishing in mind. I am quite capable of taking them apart and polishing up the BCG, inside of the upper and trigger mechanism (no, I would not round off critical parts of the trigger!).
Manic Mike

a pretty good guide to polishing over on the other site (TOS).

hellbender's guide on arfcom

 

[mtrmn]

I didn't know there was still anything useful over on that other site. Haven't been there in a few years. Looks like I was mistaken... thanks.

 

[Manic Mike]

That is actually a good guide to polishing, Thank you for the link.
Mike

 

[Quietguy88]

What year was your GGG Ball produced ?

I have some of both the production years , and the 2013 is far more accurate for me and my barrels. ( 43.5 grains of Ball Powder )

The 2015 ( ? ) Batch ... flat out was horrible in those same barrels. ( 45.6 +/- 1/10 of a grains of a ball powder )

FWIW... GGG Match ammo, 155gr, 168gr, 175gr SMK at TargetSports USA. "Decent" price for the current market.
https://www.targetsportsusa.com/ggg-308-ammo-c-2792.aspx

What year was your GGG Ball produced ?

I have some of both the production years , and the 2013 is far more accurate for me and my barrels. ( 43.5 grains of Ball Powder )

The 2015 ( ? ) Batch ... flat out was horrible in those same barrels. ( 45.6 +/- 1/10 of a grains of a ball powder )

FWIW... GGG Match ammo, 155gr, 168gr, 175gr SMK at TargetSports USA. "Decent" price for the current market.
https://www.targetsportsusa.com/ggg-308-ammo-c-2792.aspx

I have no idea. It is newer than that. Frankly, my rifle is well assembled and shoots most any m80 ammo one to one and half moa. Pending on shooter and manufacturer.

-----

I have a few "tubbs" flatwires in ar15 assemblies. Mind you, "tubbs"... because I will wager only one actual producer makes all the flat wire springs. To likely very similar specifications...

I am seeing better results from a sprinco red, 5.5oz kynshot buffer and gas tuning that I did with the JP SCS and gas tuning. Not really seeing all this muzzle dip you claim either. Dunno. Am used to 249, 240 and m2a1 bouncing around on irons.

With my 5x fixed optic, I am able to fire at a high rate. One round on 8" steel... roughly 30 to 40 rounds/minute. When at 400-500. Pending shooting position.

Of course.. some people use low power optics, go out and learn to call shots and perform well. Others turn dials all day long and use more magnification than justifiable.

This stated, is not an insult or jab. Each their own. If shooting at 500m needs 12 or even 16x power... good for you. Just - minute of head can be done on far less.

Automatic rifles... 1moa brotherman. Over any ten shot group, at best is 1moa. Are there outlier groups? Most certainly. However, that is an exception. Look at the build investment and ammunition used.

Once more, this is not a jab or insult. Simply my opinion/view/experience.

Honestly, I am not going to use anything other than hydraulic buffers and sprinco again. After all these years, I found a stackup of parts thst works for me. The pulse and feel is good. Accuracy is better than any issued weapon I have used or had.

 

[Quietguy88]

Heh manic mike, rpol is spot on. Them look normal. Barring the marks on rim. Looks like typical overgassing to me. Weapon is trying to extract before brass shrunk back. Extractor pops off rim.

Scratches look normal. The barrel extension and magazine feed lips. If you anal about it... use a very fine hobby file and then some leather/wool buffing wheels with a very fine(white or green) buffing rouge. Gently bust the edge of magazine feed lips. The inner edge that the brass touches. Polish it after.

Same thing for the barrel extension.

I did not look at the linked polishing guide. However, it probably says in depth information about it. The feed ramps and edges of barrel extension lugs at 0230 to 0330. What was referred to as " 3 oclock ".

----

You really just need a gas tube, gas block and buffer swap. Maybe a spring.

However if you opted for the gasblock, gas tube and receiver extension(buffer tube).. that would work too.

Keep us posted.

 

[Manic Mike]

Greetings All,
As predicted; a few weeks later and I have taken the advice and done the following:
Polished the front of the extractor and it's spring, polished the complete ejector, spring and spring channel, plus the face of the bolt where the cartridge sits; I left the back side of the extractor alone and only cleaned it up with a fine file.

Deburred all surfaces on the bolt carrier and polished the contact surfaces to a mirror shine.

Deburred the rear portion of the 2 bolt lugs that slide over the cartridges and polished up the bottom of the carrier that the hammer contacts.

The Hammer got smoothed out, then received a Mirror Shine, A 5.6 oz short buffer and Tubbs Flat Wire spring now reside in the carbine length tube. I actually bought the complete KAW kit suggested, but the tube and spring got attached the rear of an AR15 lower that is magically building its self. That ugly rear take down pin is a legal loop hole in The Peoples Socialist Republic of Kalifornia this week; I' sure they will change their minds next week!

The back of the bolt lugs were lapped into the barrel lugs with 600g lapping compound and a cool spring loaded cartridge. The back sides of the barrel lugs located at 2&3 o'clock were deburred and polished, so they don't scratch my pretty brass. Both feed ramps were polished to a mirror shine and the guide between them was deburred, reshaped and polished.

I took a super fine hone to the trigger mechanism, added a Superlative gas block and here she is. Ignore the white Id bands; I don't want some one putting the wrong caliber in one of these. My buddy put a .45 ACP in a 7.62x54R Ngant and it was startling to say the least; I was sitting two feet from the bolt when it went off. We were both stone cold sober in the middle of the day; I almost wish we had had an beer, as least he would have had an excuse for the stupidity. The Fine tuned .308 goes out for field testing tomorrow. On a last note, I generally use Magpul poly magazines, so I have not addressed them yet; they are scheduled for a smoothing on all contact points. I will update.
Manic Mike

 

[Quietguy88]

You been busy. Look forward to the conclusion. Best luck.

 

[TonyTheTiger]

My buddy put a .45 ACP in a 7.62x54R Ngant and it was startling to say the least; I was sitting two feet from the bolt when it went off.

How?

 

[rpoL98]

i don't think you need to polish the PMAGs, polymer won't scratch brass.

 

[mtrmn]

Greetings All,
As predicted; a few weeks later and I have taken the advice and done the following:
Polished the front of the extractor and it's spring, polished the complete ejector, spring and spring channel, plus the face of the bolt where the cartridge sits; I left the back side of the extractor alone and only cleaned it up with a fine file.
View attachment 7803379

Deburred all surfaces on the bolt carrier and polished the contact surfaces to a mirror shine.

View attachment 7803380


Deburred the rear portion of the 2 bolt lugs that slide over the cartridges and polished up the bottom of the carrier that the hammer contacts.

View attachment 7803381

The Hammer got smoothed out, then received a Mirror Shine, A 5.6 oz short buffer and Tubbs Flat Wire spring now reside in the carbine length tube. I actually bought the complete KAW kit suggested, but the tube and spring got attached the rear of an AR15 lower that is magically building its self. That ugly rear take down pin is a legal loop hole in The Peoples Socialist Republic of Kalifornia this week; I' sure they will change their minds next week!

View attachment 7803382
The back of the bolt lugs were lapped into the barrel lugs with 600g lapping compound and a cool spring loaded cartridge. The back sides of the barrel lugs located at 2&3 o'clock were deburred and polished, so they don't scratch my pretty brass. Both feed ramps were polished to a mirror shine and the guide between them was deburred, reshaped and polished.

View attachment 7803383
I took a super fine hone to the trigger mechanism, added a Superlative gas block and here she is. Ignore the white Id bands; I don't want some one putting the wrong caliber in one of these. My buddy put a .45 ACP in a 7.62x54R Ngant and it was startling to say the least; I was sitting two feet from the bolt when it went off. We were both stone cold sober in the middle of the day; I almost wish we had had an beer, as least he would have had an excuse for the stupidity. The Fine tuned .308 goes out for field testing tomorrow. On a last note, I generally use Magpul poly magazines, so I have not addressed them yet; they are scheduled for a smoothing on all contact points. I will update.
Manic Mike

"I actually bought the complete KAW kit suggested, but the tube and spring got attached the rear of an AR15 lower that is magically building its self."

The tube will be fine, but THE SPRING IS SPECIFICALLY FOR A 308 AND THE SHORT BUFFER, not AR15.
Need to pull that spring and clearly label it for it's intended purpose.

 

[Manic Mike]

The spring pulled from the KAW tube is packed and labeled, right next to the AR15 9mm spring that was replaced with a Flat Wire unit; my bad (and I am going to double check that!). As to how a .45 ACP got chambered into a 7.62x54R Ngant; the bullets were in a plastic bag on a table between us and we were playing "shoot the empty water bottle over the hill". My buddy was not paying attention (no alcohol or drugs in either of us) and he chambered the only .45 that had sneaked into the bag, closed the bolt and Seriously Surprised me. I was sitting 2 feet to his right. Big boom, smoke/debris flying out from the wrong places and the 11.43mm .45 bullet did not even try to enter the 7.62mm barrel; lesson learned-Ngant's are tough. I'll update after testing.
Manic Mike

 

[Quietguy88]

Well, did it go bang and properly function... or go boom and mimic a grenade?

 

[Manic Mike]

I have not had it out yet for testing. I am stuck behind enemy lines in the Peoples Republic of California and it is a 3 hr drive to the desert. There are ranges closer, but they have a lot of rules. I have a couple of 9mm pistols that need range testing also, so it should not be long.

 

[Quietguy88]

I have not had it out yet for testing. I am stuck behind enemy lines in the Peoples Republic of California and it is a 3 hr drive to the desert. There are ranges closer, but they have a lot of rules. I have a couple of 9mm pistols that need range testing also, so it should not be long.

I hate that place... dunno your situation, but.. if you are not significantly attached, there is always this semi-painful procedure known as relocating. It usually fixes most issues associated with the west coast.

I lived in california for a year... the beach was nice, so were the markets. That was about it. Wore through pretty fast. Arizona was ok. Lived there about five years. Probably never go back.

I would not live anywhere in that region intending to own firearms. AZ is getting pretty democratic now. A lot of transplants from CA sold their one bed one bath and bought ranch homes for the same cost. It is why I left.

Anyways - keep us posted. Hope you got it all ironed out.

What stackup of parts are you running now?

 

[Manic Mike]

Well it is off for testing Thursday. I get to go to the desert where The Peoples Socialist Republic does not allow fires??? Yep, no fires while camping, and you thought the firearm laws are insane! As noted, this one started life as a fun gun, made with left overs. Since tolerance stacking added up, it is a now a nice Scout rifle now. Aero Precision upper, BCA 16" heavy contour barrel, CRAPPY BCG (which has been given lots of TLC and polishing) and a serialized 80% lower (spite Them when you can, legally). The fire control group is straight mil-spec, with minor polishing in the right places. The short buffer tube and 3.25" long buffer have been replaced (this buffer disintegrated inside the tube on the third shot....) with the 5.8oz short buffer and Tubbs spring, I hope the cycling issues will be over.
I am almost ready to bail from CA. In the last month, the state blocked inbound shipments of:

CA compliant water based paint
A spring While this spring has thousands of applications, there was a possibility that it could be used in a firearm trigger, but they allowed a trigger
in!
A Fuel pump. Evidently we are not allowed to pump fuel into a car... but we pump fuel our cars every day.

This is all very confusing to a logical brain and I am not sure I can turn down my intelligence enough to comprehend the liberal mind set. 75 degree f weather in the middle of Winter is looking less appealing every day. I think I'll go load a few thousand 9mm rounds just to relax. As soon as this .308 is straightened out, I do have quite a few Firearms more appropriate to this forum, ranging from .50 BMG and .338 Lapua Mag all the way down to .224 Valkyrie. I am learning Long distance shooting with the intent of hitting at a mile plus. There is all sorts of fun in store as I transition from spray and pray to a 1 mile bullseye. I tend to get focused on goals and this is the next one.
Manic Mike

 

[Quietguy88]

Best luck. Hopefully it all works itself properly.

There is a lot of chaotic things going on. Maybe common sense will prevail. Likely not any time soon... looks like the non nato nation being invaded will end up receiving support from US.

Enough politics talk for me.

Let us know how it runs. Hopefully you grin ear to ear after a few mags. Not pull your hair and throw that rifle like a boomerang... which I have seen someone do before.

 

[Manic Mike]

I got the .308 out for testing and got mixed results. First the extractor does not work, even with a bit of TLC and some polishing. Looks like an extractor, if not a bolt replacement. Since it is an Aero Precision M5 upper the Bolt will be Aero Precision, If I can afford that route (wife was reading over my shoulder). If not, a new extractor is in the works from KAK.

The addition of an SA adjustable gas block and a Tubb flat wire spring did make the cycle much nicer and reliable. IF you can ignore the extraction issue (this is hard to ignore), the rifle shoots smooth and accurate. This is a lighter weight, Scout style rifle and everyone like to shoot it! I will update as soon as I get a chance to unload and get to examine the rifle carefully.
Manic Mike

 

[Quietguy88]

Describe the extraction issue?

I had nothing but trouble with that bcg. Mine looked near identical to yours. Finish, contours..

Who ever made it, hopefully no longer makes them.

If you got the coin - try a rubber city blemished bcg. I run mcfarland ring on mine and it is nice.. mine was sold as a blem because it had a chromed firing pin instead of stainless or something. It is slick and worth the money.

Or, you can go with kak.. whom I think is in bed with rubber city? They look identical. My firing pin looks picture perfect to kak's magnum firing pin.

I was informed toolcraft is also good.

Comparing my dpms bcg to the dwilson bcg... dude, I ought have saved $100 and bought a luth-ar bcg. Lessons learned.

Every now and again ar15discount has a fair deal on bcg's.

Trust me - I understand wifey minding my spending on firearms. =/

If you got a govx... (??) Ar15discount gives a coupon code option. I think govx.. I advise getting all those penny saver memberships if you can.

Otherwise - my rca bcg is pretty nice. They stand behind their products and have good customer care.

 

[Manic Mike]

So I have checked out the Rubber City BCG's and they look nice. Durkin Tactical is running a sale on .308 BCG's and I decided to get 2 of them for less than $200.00 delivered; with the correct coupon. 2 enhanced .308 BCG's for under $200.00 is almost unbelievable, so I am going to disassemble and inspect them thoroughly. If there is the slightest doubt as to their suitability, quality or reliability, I am going to return them and get 2 .308 BCG's from Rubber City. Durkin offers a 30 day return window and if I can save over $200.00, that would be swell. Durkin's BCG's matched materials and manufacturing processes with nicer ones and I have used their Glock parts with good results. Have no fear, if the BCG's are not up to snuff, they are getting returned, I have too much $$ invested in the two rifles all ready to allow inferior parts into them.

The extraction issue on the .308 is simple; half the time the extractor does not even get the cartridge part way out. It left a cartridge in and that is how it sits until a new BCG arrives. There is a new 6.5 Creedmoor that I will need advice on, as it is not functioning perfectly yet, but I am going to get the obvious problems corrected prior to annoying everyone.
Manic Mike

 

[Quietguy88]

Never heard of Durkin..

Yeah, those bolts and extractors were out of spec. The extractor from dwilson would not work on my dpms bolt, nor would the dpms extractor work on the dwilson bolt.

I tried swapping in all manners. Springs, orings, all that. After multiple headaches and measurement differences... to the trash.

You could try increasing the tension of extractor by the rubber insert and oring. But.. it may be so stiff that it cannot snap over rim.

It could be not enough positive engagement of extractor to rim..

On the other hand, it comes to a point of saying - fuck this garbage.

Best luck.

 

[mtrmn]

The bolt that fixed my cheapass PSA build was a Lantac. But by all means if your basic parts are Aero then run with that.

 

[Quietguy88]

The bolt that fixed my cheapass PSA build was a Lantac. But by all means if your basic parts are Aero then run with that.

How you like lantac? Was it just bolt or the whole bcg? Am intrigued by their forward facing vents. If memory is correct, they use different sized ports for gas bleed on the carrier as well?

Never pulled the trigger. As it were

 

[Quietguy88]

How you like lantac? Was it just bolt or the whole bcg? Am intrigued by their forward facing vents. If memory is correct, they use different sized ports for gas bleed on the carrier as well?

Never pulled the trigger. As it were

Dunno who really makes the rca/kak/aeo bcg. Did not even know it was 'aero' til mentioned.

I have a few. They work.

I heard lantac was supposed to be nice. Though, I also have heard they can be near out of spec when new in box. Something about stacking tolerances between machining each part and how much nib is built up. Ofcourse, that is said about most plated bcg's.

Will let you know when the aero/rca/kak groupset breaks. It may not be JP or LMT.. but, it seems to shoot fine. Was actually polished and by inspection appears to have been specced for nitride finish, versus being a dpms blank that never got chrome lined.

*shrug*

 

[Manic Mike]

If I had the $$ I would put a JP BCG in so fast the bullets would spin. I replaced a ******* BCG with a JP unit and everyone who shoots the .308 comments on how smooth the action is. They are pricey, but you can see the difference with the naked eye, and I am old and need glasses. Durkin is a small outfit that has supplied good quality parts at great prices. While they may not be providing a $500 BCG, so far their parts have worked well. I intend to inspect, install and test everything out quickly. I am not a patient individual.
Manic Mike

 

[mtrmn]

How you like lantac? Was it just bolt or the whole bcg? Am intrigued by their forward facing vents. If memory is correct, they use different sized ports for gas bleed on the carrier as well?

Never pulled the trigger. As it were

Since it fixed my headspace problem I REALLY like my Lantac bolt. I bought just the bolt assembly, not the whole BCG. It was polished and slick, fit the PSA carrier just fine and the excessive headspace problem disappeared. My original PSA bolt would not properly headspace with the original barrel nor the Faxon pencil bbl I replaced it with. Original bolt would easily close completely on a NOGO gage. Headspace was just one of several problems plaguing my PSA 308. I would recommend Lantac highly. I got mine from AR15discounts during the time when any 308 bolt was pretty hard to come by. They also have some guys in the technical dept that are really helpful as well.

 

[Steve_In_29]

Since it fixed my headspace problem I REALLY like my Lantac bolt. I bought just the bolt assembly, not the whole BCG. It was polished and slick, fit the PSA carrier just fine and the excessive headspace problem disappeared. My original PSA bolt would not properly headspace with the original barrel nor the Faxon pencil bbl I replaced it with. Original bolt would easily close completely on a NOGO gage. Headspace was just one of several problems plaguing my PSA 308. I would recommend Lantac highly. I got mine from AR15discounts during the time when any 308 bolt was pretty hard to come by. They also have some guys in the technical dept that are really helpful as well.

Did you contact PSA about the bolt? If so what was their response?

 

[LRRPF52]

BCA should have to pay for CS fees on every forum people show up on with problems. If I see a BCA problem thread, I don’t even bother because it could take months going back and forth, just for the customer to finally realize they need to replace the barrel with one that works.

 

[rpoL98]

Did you contact PSA about the bolt? If so what was their response?

BCA should have to pay for CS fees on every forum people show up on with problems. If I see a BCA problem thread, I don’t even bother because it could take months going back and forth, just for the customer to finally realize they need to replace the barrel with one that works.

and how do you feel about if it's PSA?

 

[Quietguy88]

If I had the $$ I would put a JP BCG in so fast the bullets would spin. I replaced a ******* BCG with a JP unit and everyone who shoots the .308 comments on how smooth the action is. They are pricey, but you can see the difference with the naked eye, and I am old and need glasses. Durkin is a small outfit that has supplied good quality parts at great prices. While they may not be providing a $500 BCG, so far their parts have worked well. I intend to inspect, install and test everything out quickly. I am not a patient individual.
Manic Mike

Brotherman...

I got a jp hp 308 bolt.. i got a rubber city hp bolt...

The JP is just known to be more consistent coming off cnc. I dislike the candy shell dlc on JP.

I think it is a wash, between the 'slickness'.

Not knocking JP.. but I bought a lot of there stuff and.. I can do just as good for less cost. Sadly, the modern firearm market has a lot of fishing lures. Some of them are for catching fish... others for catching fishermen.

My point - a lot of people think that the more you spend, the better it must be. This is not always the case.

I will never be buying a majority of those parts again. Not because they were faulty, failed or otherwise did not work. Simply.. you can easily get a product 90% as good for generally 2/3 the cost.

Them 1/3's add up into a lot more rifle parts or rifle rounds.

 

[Quietguy88]

Since it fixed my headspace problem I REALLY like my Lantac bolt. I bought just the bolt assembly, not the whole BCG. It was polished and slick, fit the PSA carrier just fine and the excessive headspace problem disappeared. My original PSA bolt would not properly headspace with the original barrel nor the Faxon pencil bbl I replaced it with. Original bolt would easily close completely on a NOGO gage. Headspace was just one of several problems plaguing my PSA 308. I would recommend Lantac highly. I got mine from AR15discounts during the time when any 308 bolt was pretty hard to come by. They also have some guys in the technical dept that are really helpful as well.

I enjoy learning of good experiences. Wonderful.

The reason why I avoided the lantac bcg was two fold. Cost and coating. Cost.. not so much.. coating, mostly.

Now, they offer nitride bcg's so...

I dislike coatings. Especially nib.

 

[Steve_In_29]

and how do you feel about if it's PSA?

Were you trying to say something to me? If so I missed your meaning.

 

[mtrmn]

Did you contact PSA about the bolt? If so what was their response?

No I didn't want to fool with the hassle of back and forth communication even if everything went good. I just wanted to get my gun running ASAP. I still have the PSA bolt. Well marked and put away. I still buy from PSA and still think they sell good quality stuff at the price point. Never once had a problem with their AR15 parts or complete kits. All these outfits can let a lemon slip by every now and then.

 

[Steve_In_29]

No I didn't want to fool with the hassle of back and forth communication even if everything went good. I just wanted to get my gun running ASAP. I still have the PSA bolt. Well marked and put away. I still buy from PSA and still think they sell good quality stuff at the price point. Never once had a problem with their AR15 parts or complete kits. All these outfits can let a lemon slip by every now and then.

I would still contact them and get it exchanged. A bad bolt does you no good sitting in parts bin and it costs you nothing but a bit of time at this point.

 

[rpoL98]

Were you trying to say something to me? If so I missed your meaning.

no, i wasn't trying to say anything to you.

 

[rpoL98]

No I didn't want to fool with the hassle of back and forth communication even if everything went good. I just wanted to get my gun running ASAP. I still have the PSA bolt. Well marked and put away. I still buy from PSA and still think they sell good quality stuff at the price point. Never once had a problem with their AR15 parts or complete kits. All these outfits can let a lemon slip by every now and then.

one day, you're gonna have a barrel that needs that PSA bolt for a proper headspace.

 

[Steve_In_29]

no, i wasn't trying to say anything to you.

I just wondered since you quoted me.

 

[Manic Mike]

I have had great luck with PSA Equipment. I am learning fast and here we go again. Durkin Tactical BCG has arrived and looks well made. I disassembled the BCG to check head space; but I only had the No Go and Field gauges, the Go gauge is on the way. The new BCG chambers rounds into full battery and the No Go and Field gauge will not allow the BCG to enter battery. From my limited knowledge, this is good. The extractor on the new BCG is clearly far superior. The BCG is installed and ready to test. Might be a week or so, as areas sociable to firing AR-10's are far from population centers, out here behind enemy lines in California.

The original Mfg has indicated that the original bolt was not a DWILSON and was produced in Denver; they seemed perturbed by the request for identification. The original Mfg (no free advertising or trash talking here) has offered to inspect and diagnose both AR10's that had this bolt, If I ship them form California to Florida, along with ammunition. I just bought a new bolt, it cost less than shipping firearms and ammunition legally. I was also worried about getting an AR10 back into the most gun friendly state in the union. I will update soon on the new bolt's extraction capabilities or be asking for advice again.
Manic Mike

 

[Quietguy88]

Awesome. Good for you on both notes. If it chambers factory rounds and does not close on nogo... you are likely set.

Dunno man, but your old shit looks almost identical in every aspect to my dwilson bcg. Hard to say who made what. The market has three or four cnc houses and hundreds of rebranded storefronts.

Take it out and use it time?

 

[Manic Mike]

Yes, time to test it! And the Distributor of the firearm seemed seriously not happy when I asked if ti was a dwislon bolt.

 

[Quietguy88]

Make you wonder a few things. Anyways - keep us posted. We are all well vested now. Time for those cloverleafs...