6MM ARC Nitride Bolt Carrier Group (BCG)

6.0MM ARC Nitride Bolt Carrier Group (BCG)

This 6.0mm ARCl 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 6mm ARC BCG will work with all AR15PARTS.COM UPPER ASSEMBLIES CHAMBERED IN 6MM ARC.

Specifications:

• 6MM ARC
• 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 (MIP)
• Shot Peened
• Black Nitride finish
• MADE IN USA