The rifle is the CMMG MK4 (Mark 4) PDW (Personal Defense Weapon) short barreled rifle in .300 Blackout. 8.2″ barrel, Yankee Hill Machine Phantom LT 7.62 suppressor, and a Primary Arms weapon sight.
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I'm not sold on the piston driven AR. Gas impingement has been working since Stoner designed the AR. if you clean your guns there isn't really a good reason for the added complexity. 99.9% of is won't ever be in a prolonged firefight where you need a gun that goes more than 1000 rounds between cleanings. at about $1 per round for .300 BLK, most of us can't afford it either. The PWS gun is a nice option for double the money compared to the CMMG. I can fire supersonic, subsonic, suppressed, and unsuppressed without changing anything on the rifle.
looks nice. i can't decide between this or the pws mk109 long stroke piston blackout…