Bushmaster Bravo Zulu AR Upper Assembly - Black .450 Bushmaster 20" Barrel 14" Bfi Free Float M-Lok Rail Snake Charmer Muzzle Brake 00-40009-BLK 604206200761

Specifications: - 450 BUSHMASTER™ - 20" Barrel with a 1:24 Twist Rate - 20" 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: - Carbine Length Gas System - Optics Ready