Description
The Midwest Industries MI AR-15/M16 Bolt Carrier group, made from 8620 and 158 Carpenter steel, has been magnetic particle inspected and is built to mil-spec standards.
Features :
- Shot peened bolt
- Hard chrome lined carrier with phosphate finish
- Chrome lined gas key, properly staked
- Shrouded Firing pin
- Mil-spec o-ring
- Black extractor insert
