[Atomic Punk]

Friend of mine came down from seattle for a few days. went out shooting with him yesterday. he brought his new bushmaster. after we got it sighted in i borrowed his BCG and finally got a chance to use my new AR build. was a lot of fun after i hot the sights set up. half way though the FCG on his died so it was mostly mine we were using. his friend dig a trigger job, something broke.

only had one problem with mine. best description would be a fail to feed. had a round get stuck between the mag lips and the feed ramp. took a min to be able to move it around so i could pull the mag out.

its a new frontier armory lower and a PSA 16" M4 upper. im about $450 into it. waiting till i can find a good quality BCG, dont want to cheap out on that.

[Dizzy Beaver]

Congrats on getting to shoot your new toy! I had a similar failure (many, many times over) with the exact opposite setup - Bushmaster rifle with a BCG that I got from PSA. That BCG went back to PSA for a refund. UPS says it was delivered yesterday...hope they don't give me any trouble on the refund.

Anyway, I ordered a BCM BCG and it arrived today. I just put it in the Bushmaster this evening and...wow. I highly recommend the BCM BCG. It's the best I've seen. I haven't had a chance to shoot it yet, but just cleaning it the quality seems top notch and operates very smoothly during function testing.

[Atomic Punk]

i read through your thread, glad i did not get the PSA BCG. i actually have two rifles i am putting together. my other upper just got back to PSA today, loose barrel nut.

[Dizzy Beaver]

I had been following your PSA upper thread, too. I hope that they get your upper corrected. I ordered from PSA because I had read a lot of good things about them. It sounds like they have had some trouble with the heavy demand recently. I hope that they get it all ironed out. I have a friend starting a build and I'm recommending a PSA stripped lower to him because they often have them in stock for $120 and sometimes have the "blemished" ones for $99.

[boomhower]

Be careful swapping around BCG's without gauging them, bad things can happen.

[Dizzy Beaver]

Please explain. Shouldn't parts from a reputable manufacturer be interchangeable? I know that there are two different sizes for buffer tubes (commercial and mil-spec), but never heard of incompatibilities between bcgs , unless maybe the bcg or upper if very poorly made from a bad company.

[faawrenchbndr]

Originally Posted by Dizzy Beaver

Please explain. Shouldn't parts from a reputable manufacturer be interchangeable? I know that there are two different sizes for buffer tubes (commercial and mil-spec), but never heard of incompatibilities between bcgs , unless maybe the bcg or upper if very poorly made from a bad company.

The thought is this, a bolt will wear to a barrel extension. If you
change that bolt to another barrel, it may wear to the point that
when the bolt is reinstalled in the 1st barrel, the head space may
be a bit extreme.

Not saying you can not do it, just not a very smart thing to do.

[Dizzy Beaver]

Okay. I misunderstood. I was thinking only of dropping a new bcg, not taking one from another gun.

[Atomic Punk]

Originally Posted by faawrenchbndr

The thought is this, a bolt will wear to a barrel extension. If you
change that bolt to another barrel, it may wear to the point that
when the bolt is reinstalled in the 1st barrel, the head space may
be a bit extreme.

Not saying you can not do it, just not a very smart thing to do.

good to know, and i can see how that would work. all AR's involved were still brand new at the time. but good notes for in the future.

[faawrenchbndr]

For a limited amount of rounds, this may be acceptable. I have just
never gotten a good feeling about doing this. I can not justify my
opinions with facts, just basing it on my thoughts about what could go wrong.