Since you say uspsa, I'd say away from hipoint, kriss, sub2k, and cheaper ar9s. All of them are notorious for reliability issues in a match. Mpx, nice higher end ar9 and on the cheap end a beretta cx4 would be the only three I'd consider based on what I've seen at matches.
Dont forget Stern Defense kit to modify your already working AR15
for those running a PCC for USPSA and steel challenge, any recommendations on a compensator that actually works?
i had the opportunity to test fire a new ruger PCC last week, the muzzle rise was a little more than i expected, or would want, especially for shooting steel. i suppose ammo selection would make a huge difference as well.
I have an at stoner break that was cheap and works surprisingly well. I don't think they are making them anymore, but it's a pretty generic design. Got mine off of their clearance page. I have not shot the ruger, is the rise due to it being lighter than say an ar9 or because the limited reach on the foregrip? My beretta cx4 seems pretty docile without a grip but the design of the cx4 basically has you wearing it rather than just shouldering it. the ar9 is even more docile with the comp and being able to run a handguard out to the end of the barrel that extends your fore hand grip out, which seems to keep the rise in check