Complete AR-15 Upper ReceiversOur AR-15 complete upper receivers ship ready-to-run from Stafford, Texas. Every upper assembly pairs a CMV or 4150 CMV barrel with a free-float rail, low-profile gas block, and forged 7075-T6 receiver. Drop on any mil-spec AR-15 lower — no gunsmith required. Available in 5.56 NATO, .300 Blackout, 7.62×39, 6.5 Grendel, and 6.8 SPC II, in barrel lengths from 7.5″ pistol to 20″ long-range.What’s includedForged upper, barrel, gas tube, gas block (pinned on select models), free-float rail, charging handle, and bolt carrier group on Complete models. Stripped uppers and barreled-uppers-without-BCG available for builders who want to spec their own BCG.Related CategoriesAR-15 RiflesBarrelsParts5.56 NATOEvery firearm on this page ships direct from our Stafford, Texas facility to the transferring FFL dealer of your choice. California, New York, New Jersey, and Massachusetts-compliant configurations available on request. NFA items (suppressors, SBRs) require Form 4 processing through your transferring dealer.