Primary Weapons Systems MK116 MOD 1-M, Upper Receiver, Fits AR-15, 223 Wylde, 16.1" Barrel, 1:8" Twist, FSC 556 Muzzle Device, 15.05" PWS MLOK Handguard, Anodized Finish, Black, Includes Radian Raptor Ambidextrous Charging Handle

The MK1 MOD 1-M line features the PWS long stroke piston system. Internally, this line offers the tried and true system that PWS owners have grown to know and love. Featuring a free-float MLOK handguard, forward assist controls, and a more true to mil-spec design, the MK1 MOD 1-M line is a go-to for not only civilians, but also Law Enforcement. With the fully forged upper and lower receivers, the MK1 MOD 1-M is a no-nonsense tool for when you need a high value option that is relentless and unstoppable. • 16.1 223 Wylde Barrel;Barrel Twist Rate 1:8;Muzzle Velocity 2980fps;PWS FSC 556;PWS Proprietary Piston Upper, T6 7075 Forged, Anodized;PWS M-Lok 15.05 Handguard • Radian Raptor Ambidextrous Charging Handle