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 Featured Products On Sale BRT 10.5" PRO 556 Barrel BRT 10.5" PRO 556 Barrel was $199.00 Save 10% $179.00 On Sale BRT 16" PRO 556 Barrel BRT 16" PRO 556 Barrel was $199.00 Save 10% $179.00 BRT M16 CHROME Bolt Assembly Kit C158 HPT/MPI BRT M16 CHROME Bolt Assembly Kit C158 HPT/MPI $123.00 BRT M4A1 Bolt Assembly C158 HPT/MPI BRT M4A1 Bolt Assembly C158 HPT/MPI $80.00 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 - Midlength BRT EZTUNE Gas Tube - Configurable - Midlength $64.95