Radian Weapons 6mm ARC 18" Complete Upper Receiver OD Green

6mm ARC turned the AR-15 into an honest 1,000 yard gun, and Radian Weapons builds the top end that lets the cartridge show it. This complete upper pairs an 18 inch barrel with the machining quality Radian is known for, the kind of fit where the charging handle runs like it is on bearings and the receiver set has zero slop.

The 18 inch length wrings full velocity from the efficient 6mm bore, a practical match for deer and pronghorn work or steel well past what 5.56 handles gracefully. The OD Green finish gives a build character without going full camo. Set it on a standard AR-15 lower and go shoot far.