Take your AR-15 platform to the next level with this 6mm ARC 18″ Complete Upper Receiver, built for shooters who demand precision, reliability, and extended range performance. Designed around an 18-inch 416R stainless steel barrel with a 1:7.5 twist rate, this upper provides excellent stabilization across the range of 6mm ARC projectile weights, delivering outstanding accuracy for long-range shooting and hunting applications.

The free-float M-Lok handguard offers a lightweight and rigid platform that enhances accuracy while allowing shooters to easily mount lights, bipods, and other accessories. A nitride-finished bolt carrier group ensures smooth cycling and long-term durability under demanding use.

Built to Mil-Spec standards, this complete upper receiver includes a charging handle and bolt carrier group, making it ready to install on any Mil-Spec AR-15 lower receiver. Whether you’re building a precision rifle, a hunting setup, or a versatile AR platform, this 6mm ARC upper provides the performance needed to stretch your rifle’s capabilities.