Core Rifle Systems AR-15 Complete Bolt Carrier Group .223 REM/5.56 NATO/.300 AAC BLACKOUT Nickel Boron

CORE15 Rifle Systems
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Core Rifles systems is excited to being offering AR-15 parts and accessories to the general public. By doing so, you now have the opportunity to purchase high quality parts directly from your favorite manufacturer, Core Rifle Systems. Great as an upgrade for your existing build or also great as a spare, make sure you keep some of these high quality parts on hand for those just in case moments.

Specifications and Features:
Core 15 Rifle Systems 12493
.223 REM/5.56 NATO/.300 AAC BLACKOUT
Mil-spec Carpenter158 steel bolt
MPI Stamped
M16 8620 Steel Carrier
Gas Key Hardened to USGI Specs
Gas Key Grade 8 Hardened Fasteners
Mil-spec Staked Gas Key
Tool Steel Extractor Upgrade
Extractor Spring
M16 Profile
Includes the Bolt, Cam Pin, Firing Pin, & Retaining Pin
Shot Peened
Nickel Boron Coating Finish

AR-15 Upper Receivers