- Mil-Spec 8620 tool steel M16 bolt carrier w/shrouded firing pin
- Laser engraved with ST Spider logo (visable through ejection port door opening)
- Mil-Spec tool steel carrier key.
- Carrier key has MIL-STD-171 phosphate finish inside and out with MIL-STD-171 hard chrome bore.
- Mil-Spec firing pin with MIL-STD-171 hard chrome finish
- Phosphate Finish
SPIKES TACTICAL AR15/M16 Bolt Carrier Group (BCG)Phosphate Finish (ST5BG01)
