BCG / Upper Parts Store / BCG / Upper Parts BRT M4A1 Bolt Carrier Group C158 HPT/MPI Auto BRT M4A1 Bolt Carrier Group C158 HPT/MPI Auto $169.00 BRT M4A1 Bolt Carrier Group C158 HPT/MPI Auto - Left Hand Marked BRT M4A1 Bolt Carrier Group C158 HPT/MPI Auto - Left Hand Marked $169.00 BRT M16 CHROME Bolt Carrier Group C158 HPT/MPI Auto BRT M16 CHROME Bolt Carrier Group C158 HPT/MPI Auto $209.00 BRT M16 CHROME Bolt Carrier Group C158 HPT/MPI Auto - xLOGO BRT M16 CHROME Bolt Carrier Group C158 HPT/MPI Auto - xLOGO $209.00 Charging Handle Charging Handle $19.95 Forged M4 Upper Forged M4 Upper $129.00 Forward Assist Kit Forward Assist Kit $14.95 Ejection Port Door Kit Ejection Port Door Kit $7.95 Optimized Carrier Key Screws Optimized Carrier Key Screws $5.95 Sold out Sprinco 4-Coil M4 Enhanced Extractor Spring Upgrade Kit Sprinco 4-Coil M4 Enhanced Extractor Spring Upgrade Kit $4.95
