CARRIER: 8620 Steel- Nitride Finish
BOLT: 9310 Steel- Nitride Finish
AR15/M16 Compatible
5.56/.223/.300 Blackout Compatible
Shot Peened
Magnetic Particle Inspected (MPI)
High Pressure Tested (HPT)
Gas Key Staked to Mil-Spec Standards
Grade 8 Hardened Fasteners
Extractor O-Ring

MADE IN USA. LIFETIME WARRANTY.