PSA BCG, quality or nah?

[26 Inf]

You’re being far too rational...

That is what I'm going for, but you are the first to even suggest I'm near the mark.

[26 Inf]

WTH I was just watching his vids two days ago.

Hmm, seems like a coincidence, but could it be the BCM cops?

[PrivateCitizen]

WTH I was just watching his vids two days ago.

Dollar bets that the YT beast thinks he is teaching people how to build guns …

[bamashooter]

Probably 10-12 BCGs purchased "from" PSA. Some are nitride, some phosphate, one nickel boron. Some have many, many rounds and others not. All have been fine, however; the boron would not toss the extracted brass while trying to strip and feed a fresh round. The fresh round would strip but get jammed up with the empty brass. This happen 5-6 consecutive attempts. This was on a new pistol. I swapped BCGs and all was well. The boron BCG worked just fine in the other pistol. Both were the same ammo brand and type (5.56). No idea if TC manufactured any of the carriers. I always run them wet but not stupid wet.

[tomme boy]

How many rounds do you have on each of them?


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Several thousand on each. One has over 14K. Only thing I have ever done was replace the gas ring with one piece ones when they got too loose. The gun that has 14K on it actually has a lot more as I used to swap that bcg between 2 uppers.

[Texas Sob]

What about these aim bcg?

https://aimsurplus.com/aim-ar15-m16-...carrier-group/

[26 Inf]

What about these aim bcg?

https://aimsurplus.com/aim-ar15-m16-...carrier-group/

That link didn't work for a BCG, 404 ERROR. I looked at the AIM BCG's - they are all 9310 steel bolts as far as I could see. The preferred material is C-158, which is a proprietary alloy, coming from one source. As a result it is more costly.

There are some who state that properly heat-treated 9310 is as good as, or better, than C-158. I don't know if that is true.

When you are looking at BCG's the magic sauce material wise is:

Bolt - C-158 steel
Bolt Carrier - 8620 steel
Carrier Key - 4130 steel
Extractor - 4140 steel
Cam pin - 4340 steel
Extractor Spring - Colt or equivalent, i.e. BCM, Springco

The mil-spec magic for the bolt is:

Shot-peened - this is to relieve stresses in the metal from machining/forging.

High Pressure Proof Tested* (HPT) mil-spec is that thebolt shall withstand the firing of one Government standard M197, 5.56mm high pressure test cartridge conforming to MIL-C-46936.

Magnetic Particle Inspected (MPI) - simply stated in MPI the part is magnetized and fine iron particles cluster along faults in the material. The process is pretty common, we magnafluxed parts in high school auto shop class.

* Here is the deal on HPT:

1) Some folks (Knight's Armament Corporation among them) belief that the HPT round unduly stresses the bolt resulting in shorter bolt life.

2) High-pressure testing adds another step and additional expense to the manufacturing process.

3) It is my understanding that the mil-spec is MPI before the HPT. This makes sense in one respect, batches of bolts are inspected BEFORE assembly into the bolt carrier. IMO while efficient, this really doesn't make sense, it seems to me that MPI would be more useful AFTER the bolt is HPT in order to reveal any issues created by the HPT. Of course, this would add more steps to the process - disassembly for MPI after the HPT, etc. So from a mass production viewpoint it would be costly and inefficient.

In addition to HPT, when you buy a BCG from BCM, it has been test-fired. Likewise, in addition to HPT, BCG's from SOLGW are full auto test fired as an assembly. This is a QC check that many feel warrants a more premium price.

For $25.00 to $50.00 less, I'm comfortable with a C-158 BCG that has been shot-peened and MPI tested. I don't feel the need for an HPT based on what I outlined (3) above.

JMO - not an engineer.

[justin_247]

What about these aim bcg?

https://aimsurplus.com/aim-ar15-m16-...carrier-group/

Fixed the link (you had the URL copied and pasted twice).

Again, I'd rather buy a Centurion Arms BCG for $25 more. It's a known-good product from a company founded and run by a highly-regarded ex-Navy SEAL who builds ARs designed for hard duty. Is $25 really so much to ask for that peace of mind?

[Wake27]

Sionics BCGs are pretty cheap at primary arms and also include Ned’s OCKS.


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[Norman]

If you've been paying attention, a lot of folks are saying their PSA's run fine, on this forum and others.

I think that at this point PSA's model - quantity sales - ought to be obvious.

Do they have the QC in place that BCM, Sionics and others have? No, probably not. But what they do have is several times the combined sales of BCM, Sionics and several others. I believe the Nazi's would have called the PSA Freedom line Volkssturmgewehr, Ford would call them Escorts.

Point being, they work fine for most folks.

Don't be this guy: (I think I saw this in a mem on pistol forum and modified it a little)

It's day eleven of the Apocalypse.

You've escaped into the hills with your supplies, and are crouching in some bushes watching with your Nightforce equipped long boi to see if you've been followed. Nobody could spot your ghillie suit from this hide.

All of a sudden, you hear a crack, frome closer than you'd expect. There's a sharp pain in your neck as the TulAmmo FMJ round tears it's way through. You've been hit by Boogaloo Bob, with his UTG decked out PSA.

You feel the wet heat as he looms inches from your face, dropping crumbs on the ground all around you. His voice creaks with moistness. 'Just as good' he whispers, stepping over your body as everything fades to black. He reaches out for your weapon with his Cheeto stained fingers. The last thing you feel - his NCSTAR sling gliding over your face.

Good one!