Primary Weapons Systems MK116 AR-15 Complete Upper Assembly 223 Wylde 16" Barrel KeyMod Rail Black

Primary Weapons Systems
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The Primary Weapons Systems MK116 upper assembly features a 4140 steel chrome lined barrel that is 16" long and chambered for .223 Wylde, allowing the gun to shoot 5.56 NATO or .223 Remington with equal accuracy. The barrel is threaded and tipped with a muzzle brake. The upper receiver is made of 7075-T6 aluminum. The upper has a free float KeyMod rail. Just pin onto your complete lower and add your favorite optics. This will make a great AR-15!

Specifications and Features
Primary Weapons Systems M116UA0B
.223 Wylde
16" 4140 steel chrome lined threaded barrel
1:8" twist
Muzzle brake
7075-T6 flat top upper receiver
Free float KeyMod rail