AT3™ AR-15 Bolt Carrier Group – 6.5 Grendel Type II – Black Nitride

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Complete your hard-hitting 6.5 Grendel or 6mm ARC upper with a Black Nitride Bolt Carrier Group

Our new 6.5 Grendel Bolt Carrier Group 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

Specifications:

  • Caliber: 6.5 Grendel Type II or 6mm ARC
  • Bolt Face Recess: .136″
  • 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

Have Questions About this Product?


The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

AT3 Lifetime Warranty Logo

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

This includes AT3 Red Dot SightsHandguardsIron 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.

Customer Reviews

Based on 3 reviews
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33%
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Scott Brown

They showed to have the part so I ordered one.but did not get it!!

So sorry to hear about the issue, Scott. We sent you a private email on March 25th.

E
Eric Williams
Quality product

Well made with precision finishing. High end fit and finish at a budget friendly price. This is my first purchase from this company and I will be back!

G
GARY WILLIAMS
AR-15 Bolt carrier.

The bolt carrier I ordered was perfect for my rifle. Fit perfectly and works even better. It came quick and the price was reasonable for the good quality. AT3 is a good place to shop. Honest company.