Guntec MIL-SPEC Bolt Carrier Group | AR .308 Caliber | Nitride

Made for 7.62X51 / 308 Cal

9310 Hardened Steel Bolt, 17-4 Stainless Steel Firing Pin (Heat treated to H900 Condition)

The group comes fully assembled with properly torqued and staked gas key

Nitride Treated

8620 carrier and gas key.

Made in the USA

HPT/MPI Tested and Marked

Hardened extractor S7 tool steel.