Originally Posted by
17K
This thread has my interest. I just got an 18" BCM SPR upper that shoots terrible. About like OP's gun. It has an A2 on it, I should take it off and see what happens.
I've got about 150 rounds through it and I haven't broke the MOA mark yet. 1.25-1.5 is all it'll do with MK262. Disappointing as I have a Colt 6920 SOCOM barrel that will handily outshoot it.
This is with a particularly good lot of CBC MK262 that will honestly sling .5moa groups through my bolt rifle with ease.
I just looked at the pictures on a bigger screen. That gun shoots bad either way. Something is wrong with it, the brake just makes it worse.