Bolt Carrier Groups 7.62×39 Spike’s Bolt Assembly- Nickel Boron$109.95Spike’s 9mm Enhanced Bolt$199.957.62×39 Spike’s Bolt Assembly- Black Nitrite$69.95.308 BCG Spikes Tactical-Phosphate$249.00Bolt Carrier Group- Lightweight Nickel Boron$250.00ION Bonded Gas Rings$9.95.308 BCG Spikes Tactical-Nickel Boron$299.00Bolt Carrier Group- Nickel Boron$225.005.56 Extractor Kit$4.955.56 Bolt Spikes HPT/MPI Bolt Assembly – Phosphate$89.955.56 Bolt Spikes HPT/MPI Bolt Assembly – Nickel Boron Finish$109.95Bolt Carrier Group- Phosphate$149.95