Primary Weapons Systems MK116 MOD 1-M 223 Wylde 16.1" Upper Receiver - MK1-M1U-223-16

The PWS MK116 MOD 1-M Upper Receiver is a high-performance, precision-engineered component designed for AR-15/M16-style rifles. Forged 7075-T651 aluminum upper and lower receivers provide mil-spec durability and seamless compatibility. Features include the PWS long-stroke piston system with adjustable gas settings, forward assist integration, and suppressor-optimized gas flow. Chambered in .223 Wylde for .223 Remington and 5.56x45 NATO, the 16.1" barrel has a 1:8 twist and sub-MOA accuracy. It ships with a free-float M-LOK handguard, PWS FSC 556 muzzle device, and Radian Raptor ambidextrous charging handle. Not available to ship to California, Illinois, Massachusetts, or Washington.