BRT M4A1 Bolt Carrier Group C158 HPT/MPI Auto BRT M4A1 Bolt Carrier Group C158 HPT/MPI Auto $149.00 Optimized Carrier Key Screws Optimized Carrier Key Screws $5.95 Charging Handle Charging Handle $19.95 Sold out Forged M4 Upper Forged M4 Upper $79.95 Forward Assist Kit Forward Assist Kit $12.95 Ejection Port Door Kit Ejection Port Door Kit $7.95
