BGR OEM BCG Nickel Boron AR15 / M16 Auto Bolt Carrier Group 9310 MPI Tested
COMPLETE AND READY TO DROP INTO YOUR M16 OR AR15
100% Made in USA and includes Lifetime Warranty.
Bolt Assembly:
?Bolt: AISI 9310 alloy steel
MPI Inspected
Extractor: Shot Peened Hardened D2 tool steel
O-Ring: Mil-Spec
Gas rings (3): Mil-Spec
Finish: Nickel Boron
Bolt Carrier:
8620 steel
Heavy Duty M16 design
Grade 8 Gas Key Screws, Staked
Gas Key Material: 4140
Finish: Nickel Boron
Cam Pin:
8620 steel
Finish: Nickel Boron
Firing Pin:
mil-spec firing pin made from centerless ground 8740 steel, hard chrome coated
