Primary Weapons Systems MMK116 MOD 1-M, Upper Receiver, 762X39, 16.1" Barrel, Triad30 Muzzle Device, Anodized Finish, Black, Radian Raptor Charging Handle, MLOK Handguard, Fits AR-15

The MK1 MOD 1-M line, revamped for 2018, 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. • Operating System: PWS Long Stroke Piston System, 3 setting Adjustable Gas Regulator • Gas System Length: Mid-Length • Barrel Twist Rate: 1:8 • Muzzle Velocity: 2980fps • Muzzle Device: PWS FSC 556 • Upper Receiver: PWS Proprietary Piston Upper, T6 7075 Forged, Anodized • Handguard: PWS M-Lok 15.05 Handguard (1.7 width, 2.25 height);Charging Handle: Radian Raptor Ambidextrous Charging Handle