Primary Weapons Systems was formed by firearm enthusiasts in 2008. Starting out by producing muzzle devices, they tested their compensators on all different types of rifles - from M4s to AK-47s. After using both styles of rifles in testing with high round counts, the difference in maintenance needed was both astounding. From that basic realization, the PWS long-stroke piston system was born

• Operating System: PWS Long Stroke Piston System, 3 setting Adjustable Gas Regulator
• Caliber: .223 Wylde
• Barrel Length: 16.1
• 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
• Lower Receiver: PWS ambidextrous MK1 MOD 2-M Multi-Caliber Lower, T6 7075 Forged, Anodized, AR-15 Compatible
• Trigger: Mil-Spec Enhanced, PTFE Coated.
• Trigger Pull Weight: 5.5 6.5 lbs.
• Buffer Tube: PWS Enhanced Buffer Tube with ratchet lock castle nut and end plate set with built-in QD mount
• Buffer: PWS Enhanced H2 Steel Body Buffer
• Furniture: Bravo Company USA Buttstock and Pistol Grip

Primary Weapons Systems Compound, Semi-automatic Rifle, AR-15, 223 Wylde, 16.1" Barrel, 1:8 Twist, FRC 2 Port Muzzle Device, MLOK Handguard, Anodized Finish, Black, Magpul Stock, Magpul Grip, 1 Magazine, 30 Rounds MK1-CPP-223-16