Primary Weapons Systems MK216 MOD 2 Upper Features The Primary Weapons Systems MK216 MOD 2 Upper pairs a 16.1 inch .308 Win barrel with the company s proprietary long-stroke gas piston operating system reducing carrier group heat and fouling compared to direct impingement designs for more consistent cycling shot after shot. The factory-installed FRC compensator manages recoil impulse and muzzle rise keeping the sight picture on target through rapid strings of fire. Built to fit the AR-10/SR25 pattern of lowers the upper is designed as a drop-in solution for shooters looking to upgrade or build a .308 Win platform without sourcing individual components. The matte finish resists glare and wear from repeated handling in the field or at the range. Machined to PWS s demanding tolerances the MK216 MOD 2 Upper delivers the fit and function serious .308 Win shooters expect from a premium AR-10 upper. Its piston system keeps the receiver cleaner over extended range sessions reducing the frequency of maintenance between outings. The upper s matte black finish provides durable corrosion resistance suited to varied weather and storage conditions. For AR-10 platform builders assembling a purpose-built precision rifle the Primary Weapons Systems MK216 MOD 2 Upper offers a dependable foundation backed by PWS s reputation for piston-driven reliability. Primary Weapons Systems MK216 MOD 2 Upper Specifications Manufacturer: Primary Weapons Systems Model: MK216 MOD 2 Upper Type: Complete Upper Receiver Caliber: .308 Win Barrel Length: 16.1 Compatible Hosts: AR-10 / SR25 Finish: Matte Black Muzzle Device: FRC Comp Available At: GrabAGun