FAIL ZERO BOLT CARRIER GROUP .224 VALKYRIE AR-15

This .224 Valkyrie Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most Mil-Spec upper receivers chambered in .224 Valkyrie.  All critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity extreme durability and increases both wear and corrosion resistance.  EXO Nickel Boron makes for easy cleanup and will improve the performance of your rifle. This bolt assembly is also compatible with the 6.8 SPC II cartridges. The extractor hardware includes a heavy spring silicone insert and o-ring to give better extraction tension.

Nickel Boron treated parts include:

• Bolt & Extractor (.224 Valkyrie and 6.8 SPC compatible)
• M16 Cut Bolt Carrier
• Cam Pin
• Carrier Key
• Firing Pin