Primary Weapons Systems Mk107 Mod 1 Upper 7.62x39 7.75 Triad30 Gas Reg Ambi

The Primary Weapons Systems MK107 MOD 1-M upper in 7.62x39 combines a rugged, pistol-length gas system with a long-stroke piston action to deliver reliable performance in compact AR platforms, making it an ideal choice for lightweight, versatile rifles used in hunting, sport shooting, and tactical applications. Built around a 7.75 barrel and a 1:10 twist, it feeds an appropriate balance of velocity and stabilization for the 7.62x39 cartridge, with a PWS Triad 30 muzzle device that directs gas pressure and minimizes recoil impulse for fast follow-up shots. The upper utilizes a PWS proprietary piston upper in T6 7075 forged aluminum, finished for durability, and is paired with a 6.9-inch M-Lok handguard that provides ample mounting options while keeping weight low. A three-setting adjustable gas regulator allows the operator to tailor cycling to ammo, suppressors, or environmental conditions, enhancing reliability across a wide range of scenarios. The Radian Raptor ambidextrous charging handle ensures smooth, controllable operation from either side of the platform. All told, the MK107 MOD 1-M upper merges precise engineering with practical features to support accurate, repeatable performance in demanding field or range environments.