Shop BRT Barrels Barrels Uppers Uppers BCG / Upper Parts BCG / Upper Parts Adjustable Gas Drive Adjustable Gas Drive Gas System Gas System Muzzle Devices Muzzle Devices 9mm AR 9mm AR Featured Products BRT 11.5" OPTIMUM Hammer Forged Chrome Lined Barrel BRT 11.5" OPTIMUM Hammer Forged Chrome Lined Barrel $325.00 BRT 14.5" OPTIMUM Hammer Forged Chrome Lined Barrel BRT 14.5" OPTIMUM Hammer Forged Chrome Lined Barrel $325.00 BRT 16" PRO 556 Barrel BRT 16" PRO 556 Barrel $199.00 On Sale BRT 8.5" SUBGUN 9mm AR Barrel BRT 8.5" SUBGUN 9mm AR Barrel was $145.00 Save 18% $119.00 BRT M16 CHROME Bolt Assembly Kit C158 HPT/MPI BRT M16 CHROME Bolt Assembly Kit C158 HPT/MPI $123.00 BRT SUBGUN 9MM Bolt Carrier Group BRT SUBGUN 9MM Bolt Carrier Group $149.00 BRT M4A1 Bolt Carrier Group C158 HPT/MPI Auto BRT M4A1 Bolt Carrier Group C158 HPT/MPI Auto $169.00 BRT EZTUNE Gas Tube - Configurable - Carbine BRT EZTUNE Gas Tube - Configurable - Carbine $64.95 BRT EZTUNE Gas Tube - Configurable - Midlength BRT EZTUNE Gas Tube - Configurable - Midlength $64.95