Primary Weapons Systems MK114 Mod 1-M .223 Wylde 14.5″ Barrel

Primary Weapons Systems MK114 Mod 1-M Features

The MK114 Mod 1-M Upper Receiver utilizes the PWS Long Stroke Piston System with a 3-setting adjustable gas regulator, providing enhanced reliability and reduced maintenance compared to traditional direct impingement systems. Constructed from T6 7075 forged aluminum, the upper receiver is built for strength and durability.

The 14.5″ barrel, chambered in .223 Wylde, offers a 1:8 twist rate, optimizing it for a wide range of bullet weights. With a muzzle velocity of 2921 fps, this upper receiver delivers superior performance. The PWS M-Lok 13.624″ handguard provides ample space for accessory mounting, combining a slim profile with robust construction. The handguard measures 1.7″ in width and 2.25″ in height, ensuring a comfortable and ergonomic grip. Additionally, the Radian Raptor Ambidextrous Charging Handle offers ease of use for both right- and left-handed shooters.

Primary Weapons Systems MK114 Mod 1-M Specifications

• Brand: Primary Weapons Systems
• Model: MK114 Mod 1-M Upper Receiver
• Caliber: .223 Wylde
• Barrel Length: 14.5″
• Gas System Length: Mid-Length
• Barrel Twist Rate: 1:8
• Muzzle Velocity: 2921 fps
• Muzzle Device: No muzzle device included (All NFA rules apply)
• Operating System: PWS Long Stroke Piston System with 3-Setting Adjustable Gas Regulator
• Upper Receiver: PWS Proprietary Piston Upper, T6 7075 Forged, Anodized
• Handguard: PWS M-Lok 13.624″ Handguard (1.7″ width, 2.25″ height)
• Finish: Anodized Black
• Charging Handle: Radian Raptor Ambidextrous Charging Handle
• Compatibility: Fits AR-15