Spikes ST5BG03 Bolt Carrier Group 223 Rem,5.56x45mm NATO Nickel Boron Steel AR-15, M16 Full Auto $202.50
Spikes ST5BG01 Bolt Carrier Group 223 Rem,5.56x45mm NATO Black Phosphate Steel AR-15, M16 Full Auto $134.96
LBE Unlimited M16BCG-NIB Complete BCG 5.56x45mm NATO, Nickel Boron Coated 8620 Steel, Full Auto Rated For AR Platform $150.54