223/556 Nitride Bolt Carrier Group (BCG)

223/556 Nitride Bolt Carrier Group (BCG)

This .223/5.56 Bolt Carrier Group (BCG) is manufactured by Swan Machine specifically for AR15Parts.com.  It is built to Mil-Spec standards that include a 9310 steel bolt assembly that is nitride treated for durability, a nitride treated 8620 steel carrier assembly, and a properly staked gas key (grade 8 fasteners).  This .223/5.56 BCG will work with all AR15PARTS.COM UPPER ASSEMBLIES CHAMBERED IN 223/556/300BO/350L/204R.

Specifications:

• 5.56/223/300BLK/204 Ruger/350 Legend
• AR15/M16/M4 Mil-Spec Profile 
• 8620 Steel Carrier
• 9310 Steel Bolt
• MIM Steel Extractor w/ Crane (NAVSPECWAR) o-ring & spring
• Mil-Spec Staking on the Keys
• Magnectic Particle Inspected (MPI)
• Shot Peened
• Black Nitride finish
• MADE IN USA