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AT3™ AR-15 Bolt Carrier Group -  5.56 NATO/.300 Blackout - Black Nitride

AT3™ AR-15 Bolt Carrier Group – 5.56 NATO/.300 Blackout – Black Nitride

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Lifetime WarrantyOn All AT3 Brand Products

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.

This includes AT3 Red Dot Sights, Handguards, Iron Sights, and any other product that carries the “AT3 Tactical” or “AT3™” name. For other brands (ex. Magpul or Troy), please refer to the manufacturer’s warranty policy.

In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.

If we cannot repair your product, we will replace it with a product in perfect working order of equal or better physical condition. The warranty is fully transferable, but we may require information about the original purchase to validate the authenticity of the product.

If your product is in need of warranty service, please contact AT3 Tactical to start the process

Our contact info is available here. To expedite processing, please provide your order information and description of the defect.

Please note: The AT3 Lifetime Warranty does not cover loss, theft, intentional damage or cosmetic damage that doesn’t affect the performance of the product.

Fast & Free Shipping On orders over $50

You will receive fast, free shipping for all orders over $50

Shipping cost is $7.99 for orders under $50. We ship with UPS or USPS, depending on the item.

Most orders received by 1pm CST ship the same day

You will receive an email with tracking information at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses. Orders placed on weekends, holidays, or after 1pm will ship the following business day.

AT3 Tactical is bringing you the best with this Top-Tier Black Nitride Bolt Carrier Group.

It features a black salt bath nitride finish, MPI inspected bolt, properly staked grade 8 gas key screws, and a lifetime warranty.

The black nitride finish features excellent hardness and lubricity, which means this BCG is durable, easy to clean, and less reliant on lubrication when compared to mil-spec phosphate coating

The bolt carrier group is the workhorse of your rifle, and a quality BCG is critical to reliable rifle function. Get a bolt carrier group that is guaranteed to last a lifetime.

Made in the USA


  • Caliber: .223/5.56/.300 Blackout
  • Finish type: Black Salt Bath Nitride
  • Carrier Type: M16 Auto (Ideal for AR-15)
  • Carrier Material: 8620 Gun Steel
  • Gas Key Material: 4130 Steel
  • Gas Key Screws: Grade 8
  • Bolt Material: MPI tested 9310 Steel, Shot Peened
  • Extractor Material: 4140 Steel
  • Cam Pin Material: 8620 Steel
  • Firing Pin Material: 4140 Steel, Chrome Plated
  • Mil-Spec O-Ring and Gas Rings
  • Weight: 11.5 oz.

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Customer Reviews

Based on 16 reviews
Pistol upper

Got all the parts I needed to assemble my upper. Good stuff and great prices. Bolt carrier group looks as a mil spec should. Thanks AT3

Thanks for sharing your feedback, Mark. We're glad you're satisfied with your purchase. Cheers!

BCG arrived promptly and helped move the build forward. Will get out to the range in next couple of weeks to determine performance. The BCG on inspection was staked appropriately, clean and oiled. No problems detected and in appearance matches a Faxon nitride bolt that was significantly more expensive if it performs, as well as, it looks it will be a keeper and a must have for future builds.

Thanks for sharing your feedback, Frank. We're glad you're satisfied with your purchase. Cheers!
High Quality BCG

everything you could want out of a BCG at a great price. I WILL be buying again

Thanks for sharing your feedback, John. We're glad you're satisfied with your purchase. Cheers!
AT 15 volt carrier group

Received in very timely manner. Fired several rounds. Works flawlessly. Great product. Great price. Ordered a second for another build. Very satisfied

Thanks for sharing your feedback, Lester. We're glad you're satisfied with your purchase. Cheers!
Great product great costumer service

This was my first build and they worked with me to make sure I was successful and within budget. Went together great, shot accurate and no jams after 50 rounds. Will definitely come back for more ar parts.

Thanks for sharing your feedback, David. We're glad you're satisfied with your purchase. Cheers!