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AR-15 Bolt Carrier Group (Full Auto Profile) - .223 / 5.56mm NATO / .300 AAC Blackout

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Made in the USA. Our bolt carrier group is manufactured using properly heat-treated 8620 and 9310 tool steel, which provide even better wear and shatter resistance than the original (mil-spec) Carpenter No. 158 steel used in older bolts. Each bolt and carrier is high-pressure tested (HPT), and MPI (magnetic particle inspected) before shipment. The gas key is treated with an upgraded nitride coating, which provides better wear resistance and natural lubrication compared to the old chrome-line and phosphating methods used years before.

Each gas key is machined from solid bar stock and then secured with Grade-8 fasteners. Bolts are properly staked to prevent them from ever loosening in the field. The entire bolt carrier is also nitrided to provide ample protection against heat and carbon fouling, making this M16-profile BCG a truly battle-ready component in your next AR rifle or pistol build.


  • Bolt: Heat-treated 9310 Steel
  • Carrier: Mil-spec 8620 Steel
  • Profile: M16/Full-Auto
  • Coating: Black Nitride
  • Gas Key: Hardened to USGI specifications
  • Fasteners: Key staked w/ G8 Fasteners
  • Extractor: S7 Tool Steel extractor and extractor spring
  • Please Note: Bolt Carrier Group will be packaged dry, lubricate BCG before use.

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Shipping Restrictions

Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily. only ships within the United States. Federal legislation dictates we cannot ship our products internationally.

.223 Wylde
.300 AAC Blackout

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.