Shop BRT BarrelsBarrelsUppersUppersBCG / Upper PartsBCG / Upper PartsAdjustable Gas SystemAdjustable Gas SystemGas SystemGas SystemMuzzle DevicesMuzzle Devices9mm AR9mm ARFeatured ProductsBRT 8.3" OPTIMUM PDW Hammer Forged Chrome Lined Barrel - 556BRT 8.3" OPTIMUM PDW Hammer Forged Chrome Lined Barrel - 556$250.00BRT 10.3" Cold Hammer Forged Govt BarrelBRT 10.3" Cold Hammer Forged Govt Barrel$300.00BRT 11.5" Cold Hammer Forged Govt BarrelBRT 11.5" Cold Hammer Forged Govt Barrel$300.00BRT 16" Cold Hammer Forged Govt BarrelBRT 16" Cold Hammer Forged Govt Barrel$300.00BRT M16 CHROME Bolt Carrier Group C158 HPT/MPI AutoBRT M16 CHROME Bolt Carrier Group C158 HPT/MPI Auto$209.00BRT M4A1 Bolt Carrier Group C158 HPT/MPI AutoBRT M4A1 Bolt Carrier Group C158 HPT/MPI Auto$169.00BRT EZTUNE Gas Tube - Configurable - MidlengthBRT EZTUNE Gas Tube - Configurable - MidlengthMidlength$64.95BRT EZTUNE Gas Tube - Configurable - CarbineBRT EZTUNE Gas Tube - Configurable - CarbineCarbine5.0(2)$64.95