Brownells BRN-4 Complete Upper Receiver AR-15 5.56 NATO 13.5 Inch Handguard

BRN-4 Complete Upper Receivers assembled from all new components, now with handguard and muzzle device. The BRN-4 Upper Receiver is available as a Complete Upper with Handguard, Muzzle Device, Barrel and Gas System installed. Attach to your AR-15 lower receiver and you’re ready to hit the range. Options exist for shorter 9 inch Midwest Industries handguards or longer 13.5 inch Midwest Industries handguards depending on barrel length. Upper includes Magpul ejector port cover and mil-spec charging handle. Gas blocks are matched to barrel length. All BRN-4 Upper Receiver Assemblies are test fired before final packaging; upper may show brass marks. Barrels are chambered 5.56x45mm NATO, button rifled with a 1-7 twist, 1/2-28 muzzle thread and come with the appropriate gas block for the given length.