Qualtiy upper - Primary Weapons Systems MK111 MOD1-M .223 Wylde, 11.85in bbl Upper Receiver

I love PWS products. Very durable and accurate. The only downside to these uppers are they are definitely on the heavier side compared to traditional gas impingement. That's not deal breaker for me, just something to be aware of. This upper came with a PWS muzzle device designed for their suppressors neat that they included this my last upper came with standard muzzle brake. BTW their muzzle brake works well, but is very loud. Last thing is the cam pins on the BCGs don't seem to unlock fast enough on these uppers and I have had issues in the past where they contact the pocket inside the upper and can mar it up fairly bad. This is issue is pretty easily rememdied by replacing the cam pin with a Patriot Ordnance Factory roller cam pin. Great system for suppressing.