Proprietary gas-piston operating systems. P1 basic specs: 5.56 NATO chamber, 16″ barrel, 1:7 twist rate. A2 flash hider, Adams Arms standard piston system, carbine length. 6.3 pounds. P2 specs similar to P1 rifle. Also includes Adams Arms case, flip-up iron sights, Rise Armament Rave-140 drop-in fire-control group, Bravo B5 stock, mid-length gas system. 7 pounds. P3 rifles similar to P2 line. Come in 223 Wylde chamber, 16″ barrel, 1:8 twist. Triggertech Diamond drop-in fire-control group, LUTH-AR stock. 6.6 pounds. Starting in 2026, includes parts and rifles from Alexandria Pro-Fab (APF Armory). Select left-hand models available.