Brownells BRN M16A1 UPPER RECEIVER 20'' RIFLE LENGTH, 1-12 TWIST, BLACK BRN-M16A1-12

The BRN-16A1® Complete Upper Receivers are back! Styled after the issued U.S. M16A1, the BRN-16A1® has distinct features, found on late 1960s M16 rifles. The muzzle of the BRN16A1®, is capped by the classic A1 flash hider, with ports around its radius, and is retained by a proper split washer. The flash hider is attached to a lightweight 20 inch barrel, found on AR-15 variants through the M16A1. Available with a 1-12 or 1-7 twist. Select 1-12 if shooting 55gr bullets, and 1-7 if shooting 62gr or heavier. The front sight base is not F-marked, meaning the round, tapered front sight post is properly in line with the carry handle rear sight. The black triangle handguards closely emulate the original M16A1 handguards. A flat slip ring is at the end of the 5.56x45mm NATO barrel assembly. Mounted to the upper is a proper ejection port cover, with a flat external "bump" (not just an off the shelf A2). The receiver is the proper M16A1 style, with a forward assist but no shell deflector. The rear sight is the standard A1 aperture, that can easily be adjusted with a cartridge or tool. Included bolt carrier group is the proper manganese phosphate mil-spec BCG, with chrome lined interior. Key features of the BRN-16A1®: M16A1 upper receiver without shell deflector 20" 5.56x45mm NATO barrel with 1-12 or 1-7 twist & chrome bore & chamber M16A1 ejection port cover Tear drop forward assist A1 rear sight assembly A1 black polymer handguards with heatshields Manganese phosphate mil-spec bolt carrier group with 9310 bolt A1 flash hider