Product Description
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