This is a Short Barreled Rifle (SBR) version of the Bushmaster Bravo Zulu rifle.  ALL NFA RULES APPLY. (All Sales Are Final On NFA Items, No Returns) Specifications: - 5.56NATO (.223 ) -11.5" Barrel with a 1:7 Twist Rate - 29.5-32.5" Length - 7075-T6 Aluminum Upper & Lower Receiver  -Type III Hard Coat Anodizing - Salt Bath Nitride Barrel - BFI™ 10" Free Float Rail - Salt Bath Nitride Bolt Carrier Group - MPI Tested Bolt - Snake Charmer™ Muzzle Brake - DM2S™ two stage Trigger  Features:  - Equipped with a Thril Polymer 30 Round Mag - Carbine-Length Gas System - Thril Combat Competition 6 position stock  - Thril Rugged Pistol Grip  - Thril Trigger gaurd  - Optics Ready    Proudly Made In U.S.A.