Primary Weapon Systems MK111 MOD 1-M .223 Wylde Complete Upper Receiver - 11.85" - FRC Comp

Designed for compact AR-15 builds and suppressed rifle configurations, the Primary Weapon Systems MK111 MOD 1-M .223 Wylde Complete Upper Receiver supports reliable operation in close-quarters shooting, patrol rifle setups, and modern sporting rifle use. This complete AR-15 upper assembly is chambered in .223 Wylde and utilizes the PWS long-stroke piston operating system with an adjustable gas system that regulates cycling while reducing internal fouling. The chamber supports both .223 Remington and 5.56 NATO ammunition, allowing consistent accuracy, controlled recoil impulse, and dependable performance during high-volume firing or suppressed operation. It incorporates an 11.85-inch barrel with a 1:8 twist rate, a forged 7075 aluminum upper receiver with forward assist, a free-float M-LOK handguard for accessory mounting, and a factory-installed FRC compensator, with a black anodized receiver and components manufactured in the United States.

Features:

• .223 Wylde AR-15 upper receiver
• 11.85" barrel with 1:8 twist rate
• PWS long-stroke piston operating system
• Adjustable gas system for suppressed or unsuppressed use
• Forged 7075 aluminum upper receiver with forward assist
• Free-float M-LOK handguard for accessory mounting
• FRC compensator compatible with Rearden Atlas suppressor mounting
• Radian Raptor ambidextrous charging handle
• Sub-MOA accuracy potential with quality ammunition