The new 6mm ARC complete upper kit is here at Apache. Our pro shooter reports flat-shooting, no turret adjustments needed to at least 700 yards; just simple minimal holdovers.

Apache hex barrel in stainless, 20" barrel in the 7.5 twist is the sweet spot in Hornady's new 6mm ARC round. Designed to be effective to well farther than the 5.56 round. It's range is jaw-dropping in the AR15 platform. 

The complete upper kit is a built, operational upper receiver that instantly mounts atop your already owned AR15 lower receiver. Complete upper means it also includes the necessary 6mm bolt-carrying-group and charging handle. Apache does not provide lower receivers or whole ARs. As with all new Apache uppers, the caliber ID is clearly marked on both sides of the ejection port cover to help against mis-matching calibers. 

As an Apache upper, it was test fired for function before it leaves to you, and qualifies for Apache's Lifetime Warranty for function and workmanship. See our Lifetime Warranty paragraph for complete details.