Primary Weapons Systems, MK114 Mod 1-M Upper

Primary Weapons Systems MK114 Mod 1-M Complete Upper Receiver 223 Wylde, 14.5" Barrel The Long Stroke System Has more Dwell time, this reduces Bolt Carrier Velocity, so its softer shooting and a reduction of Sound when Suppressed Operating System: PWS Long Stroke Piston System, 3 setting Adjustable Gas Regulator Caliber: .223 Wylde Barrel Length: 14.5" Gas System Length: Mid-Length Barrel Twist Rate: 1:8 Muzzle Velocity: 2921 fps Muzzle Device: No muzzle device included. All NFA rules apply. Upper Receiver: PWS Proprietary Piston Upper, T6 7075 Forged, Anodized Handguard: PWS M-Lok 13.624" Handguard (1.7" width, 2.25" height) Charging Handle: Radian Raptor Ambidextrous Charging Handle Product Description