Franklin Armory Ar-15 BCG "Bolt Carrier Group" come in the following calibers:
*5.56 NATO
SPECIFICATIONS:
*Carrier machined from 8620 Steel
*Bolt machined from Carpenter No. 158 steel
*MPI Bolt
*M16 full auto style
*Properly staked gas key
*Polished finish
*Franklin Armory logo included
*Treated with SBN (Salt Bath Nitride)
*Bolt Machined from 9310 or 158 Carpenter steel (depending on availability)
*Extractor "O-Ring"
*Extractor “Spring”
*Stainless Steel Firing Pin
Not available for sale in: DE, IL, MA, NJ, NY
