2700 round update on my PSA AR (now with broken parts!)

Huge, huge difference at the range today. No face full of gas, no oil/crud blowing out between the upper and lower covering me in crap.

Was mostly doing slow fire for accuracy testing some ammo, but in the name of science I did a mag dump at the end. 130 rounds fired, zero issues. That's not definitive considering it takes 350 before it usually starts giving me issues, but so far it seems fixed and less 'gassy' than before. Ha.

I'll skip cleaning it after today and let it build up more rounds and see if it falls apart where it usually does or do the rings solve that.
 
SPST said:
Anybody else have a similar round count on a S&W M&P Sport II or a 6920 to compare?
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Funny u should ask cause I have put thousands of rounds through both my colt and m&p and I have never had a problem with either. I also clean them every time I shoot them unlike my precision rifles cause a dirty bolt gun will out perform a clean one any day of the week.
 
I'm just wondering if your bolt looks like this one. If not, you got the cheap 'freedom' BCG...and the rings died in 2500rds. I usually buy Toolcraft, since they have a milspec CAGE number,
but the PSA premium BCG/bolts are GTG.

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BTW here's a pretty good write up about the AR's gas rings, their function, and a simplified explanation of the Stoner gas metering system
https://www.all4shooters.com/en/Shooting/technics/AR-15-gas-rings/

Key paragraph:

Checking the gas rings condition of an AR-15, M4 or M16 rifle is very easy. The firearm must be field stripped, and the bolt carrier group disassembled and properly cleaned and lubed following standard practices. Before reassembly, inspect the gas rings on the bolt for obvious warping or damage. Once reassembled, push the bolt in the carrier in the “locked” position, then hold the bolt carrier group vertically and just turn it over so that the bolt facing downwards.

If the bolt “falls” under its own weight out of the bolt carrier group, the gas rings are badly worn out and should be replaced immediately.

If the bolt does not fall under its own weight, pull it out to the “unlocked” position, as if the BCG was to be reassembled in the rifle. Place the BCG vertically on a flat, stable surface, like a table, with the bolt head facing downwards.

If the carrier weight is enough to make it slowly “collapse” over the bolt, the gas rings are moderately worn but there should be no impact, reliability or functionally wise – just be aware that the gas rings may have to be replaced soon.
 
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Ikarus1 said:
I'm just wondering if your bolt looks like this one. If not, you got the cheap 'freedom' BCG...
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It's the $420 freedom build kit, so it's not going to have top quality components. It can't considering it comes with $200 in magpul stuff as part of the kit, they have to cut corners somewhere.

I've been told by at least 4 people now to get a 2nd BGC as a spare, so I'll likely just order a nickel boron one to use as the primary and make the original the spare.
 
Jayne said:
It's the $420 freedom build kit, so it's not going to have top quality components. It can't considering it comes with $200 in magpul stuff as part of the kit, they have to cut corners somewhere.

I've been told by at least 4 people now to get a 2nd BGC as a spare, so I'll likely just order a nickel boron one to use as the primary and make the original the spare.
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get the premium PSA one and a spare CH for $90 shipped. Or just put new rings and run it til the bolt breaks. I'm a big fan of breaking things on fun guns
 
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