Primary Weapons Systems was formed by firearm enthusiasts in 2008. Starting out by producing muzzle devices, we tested our 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; keeping the core values of the AR-15 design, while also lessening the need for maintenance in high-volume fire situations and adverse conditions. The Compound Rifle is a combination of a Mod 1 upper, with the Mk1 Mod 2 Lower.

Features :

• Operating System: PWS Long Stroke Piston System, 3 setting Adjustable Gas Regulator
• Caliber: .223 Wylde
• ,Barrel Length: 7.75";"Gas System Length: Carbine,
• Barrel Twist Rate: 1:8
• Muzzle Velocity: 2741 fps
• Muzzle Device: PWS Triad 556
• Upper Receiver: PWS Proprietary Piston Upper, T6 7075 Forged, Anodized
• ,Handguard: PWS MLok 7.1" Handguard (1.8" width, 2.1" height),
• Charging Handle: Radian Raptor Ambidextrous Charging Handle