Bushmaster Bravo Zulu AR15 Complete Upper Assembly - Black | 5.56NATO | 16" Barrel | 14" BFI Free Float M-LOK Rail | Snake Charmer Muzzle Brake

Specifications: - 5.56 NATO - 16" Barrel with a 1x8 Twist Rate - 16" length - MLOK® 14" Free Float Rail with QD Sling Swivel Mounts - Salt Bath Nitride Bolt Carrier Group - MPI Tested Bolt - Snake Charmer™ Muzzle Brake    Features:  - Mid- Length Gas System - Optics Ready    Proudly Made In U.S.A.