weaponoutfitters: Primary Weapons Systems Mk116 (Long Stroke) Gas Piston Upper. Lightweight, durable, and accurate… with the benefit of a smooth recoil impulse and clean running long stroke piston system. It’s truly the best of both worlds,
weaponoutfitters: Primary Weapons Systems Mk116 (Long Stroke) Gas Piston Upper. Lightweight, durable, and accurate… with the benefit of a smooth recoil impulse and clean running long stroke piston system. It’s truly the best of both worlds,
