Primary Weapons Systems MK1 Mod 2-M Features The pinned and welded PWS FSC 556 muzzle device extends the 14.5 inch barrel to a 16 inch overall length while delivering effective recoil and flash control and the PWS PicLok 13.574 inch handguard gives shooters a slim 1.7 inch wide 2.25 inch tall gripping surface for mounting accessories. The mil-spec enhanced PTFE-coated trigger breaks at 5.5 to 6.5 pounds for a consistent low-friction pull shot after shot. The 1.2 inch diameter enhanced buffer tube includes a ratchet lock castle nut and end plate set with a built-in QD sling mount and the enhanced H2 steel body buffer works with the long-stroke piston system to keep recoil impulse smooth and controllable. Bravo Company USA furniture on the buttstock and pistol grip provides a proven comfortable interface for extended range sessions. For shooters who want a piston-operated AR with a permanently mounted muzzle device and ambidextrous controls the MK1 Mod 2-M is available for sale at GrabAGun. Primary Weapons Systems MK1 Mod 2-M Specifications Manufacturer: Primary Weapons Systems Model: MK1 Mod 2-M Type: Semi-Auto Rifle Caliber: .223 Wylde Barrel Length: 16 (14.5 Pinned and Welded) Capacity: 30 Rounds Operating System: PWS Long Stroke Piston 3-Position Adjustable Gas Gas System Length: Mid-Length Barrel Twist: 1:8 Muzzle Device: PWS FSC 556 Pinned and Welded Upper Receiver: PWS Piston Upper 7075 Forged Anodized Lower Receiver: PWS MK1 Mod 2-M 7075-T651 Hard Anodized Handguard: PWS PicLok 13.574 Charging Handle: Radian Raptor Ambidextrous Trigger: Mil-Spec Enhanced PTFE Coated 5.5-6.5 lbs Furniture: Bravo Company USA Buttstock and Grip Weight: 6.7 lbs Available At: GrabAGun