PWS MK116 Mod 1-M Upper | .223 Wylde | 16.1in

The PWS MK116 Mod 1-M is a complete AR upper built around Primary Weapons Systems’ long-stroke piston architecture and a precision Boise-made barrel. It is chambered in .223 Wylde and finished in anodized black with a free-float M-LOK handguard for modern accessory mounting. The design incorporates forward assist controls, a Radian Raptor ambidextrous charging handle, and forged 7075-T651 receiver construction for strength and serviceability.

Recommended applications include precision target work and competition/range use where reduced fouling and consistent gas performance are priorities.

Product Specifications

• The chambering is .223 Wylde, designed to accommodate both .223 Remington and 5.56mm NATO dimensions.
• The barrel measures 16.1 inches and is described as a Boise-made precision barrel.
• The long-stroke piston operating system is the PWS piston system for reduced fouling and adjustable gas settings.
• The receiver material is 7075-T651 forged aluminum for durability and mil-spec compatibility.
• The handguard style is a free-float M-LOK design for accessory mounting and improved balance.
• The finish is anodized in black.
• The product includes a Radian Raptor ambidextrous charging handle for left- and right-handed operation.
• The listed muzzle device is the PWS FSC 556 to mitigate recoil and muzzle rise.
• Forward assist integration is provided as a standard control to assist reliable chambering.
• The barrel twist rate is 1:8 (1-8 rate of twist) for stabilizing a range of bullet weights.
• The assembly is a complete upper receiver intended for AR-style rifles.
• The overall weight is listed as 5.24 (units as provided by the manufacturer).
• The product listing states a Sub-MOA accuracy guarantee when used with high-grade ammunition.
• The warranty offering is the PWS VOW, which covers repair or replacement for defects per manufacturer terms.
• UPC: 811154033499.

The MK116 Mod 1-M pairs PWS’s piston reliability with a precision barrel and modern accessory compatibility to deliver a versatile upper for shooters who demand reduced fouling and consistent gas management. Its forged receiver and robust controls make it a straightforward upgrade for range-focused builds and competition platforms where repeatable performance matters.