Pws Mk109 Mod 2-m Upper 300blk 9.75

The Pws Mk109 Mod 2-m Upper 300blk 9.75 is a purpose-built solution for operators demanding a compact, hard-hitting platform optimized for suppressed use. Designed by Primary Weapons Systems, this upper receiver leverages the .300 Blackout cartridge to provide superior terminal ballistics from a short 9.75-inch barrel. It serves as a primary choice for professional end-users who require the maneuverability of a sub-compact weapon without sacrificing the reliability of a long-stroke piston system.

At the heart of the Pws Mk109 Mod 2-m Upper 300blk 9.75 is the MOD 2-M forged receiver, which is engineered to be lighter and stronger than traditional mil-spec offerings. The long-stroke piston design keeps carbon fouling and heat away from the bolt carrier group, ensuring consistent cycling even during high-volume strings of fire or while running subsonic ammunition. The integrated adjustable gas block allows you to tune the dwell time specifically for your muzzle device, maximizing both reliability and shooter comfort.

This upper is highly compatible with standard AR-15 lower receivers, making it an excellent choice for those looking to buy a high-performance upgrade for their existing platform. Tactical professionals benefit from the M-LOK handguard that provides ample real estate for lights, lasers, and vertical grips while maintaining a slim profile. Whether you are reviewing specifications for a duty rifle or building a dedicated defense tool, this upper receiver provides the precision and durability required for mission success.