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AT3™ AR-15 Nickel Boron Bolt Carrier Group – 6.5 Grendel/6mm ARC

SKU: BCG-65TYPEII-NIB

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Backed by the AT3 Lifetime Warranty!
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Run Your 6.5 Grendel or 6mm ARC Upper Right with a NiB BCG

It’s important to have a bolt carrier group that has everything you need.  MPI inspected bolt, properly staked grade 8 gas key screws, chrome plated firing pin, plus a lifetime warranty, just in case.  There’s plenty of tough finishes out there too, but few are as slick and tough as Nickel Boron.

Nickel Boron (NiB) coated bolt carriers have greater lubricity than your standard phosphate finish, and are easier to clean than black nitride.  At the very least, it’s easier to see how much carbon you can wipe off to reveal the chrome-like finish after a day of shooting.  And it’s a perfect match for a 6.5 Grendel Type II barrel, or the new 6mm ARC.

The BCG is the workhorse of your rifle – and it pays to have one that runs reliably.  And it’s easy to keep this one in tip-top condition for a lifetime of use.

Made in the USA

Specifications:

  • Caliber: 6.5 Grendel Type II or 6mm ARC
  • Bolt Face Recess: .136″
  • Finish type: Nickel Boron (NiB)
  • 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

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 6 reviews
83%
(5)
17%
(1)
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(0)
0%
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G
George Cella

Excellent. Fit and finish were superb. Worked flawlessly. I highly recommend it.

R
R.N.
6 ARC NB BCG

Bought this for my first AR build in 6 ARC researching coatings like everyone does and went with this it has been flawless have only around 250 through it with no issues easy to clean will be getting another for 22 ARC build

Thank you for leaving us a review for our AT3™ AR-15 Nickel Boron Bolt Carrier Group in 6.5 Grendel/6mm ARC. We're thrilled to hear that it has been running smoothly with 250 rounds through it and that it was easy to clean. We appreciate your support and look forward to potentially helping you with your 22 ARC build in the future. Thanks again!

R
R.N.
AT3 BCG 6.5 Grendel for 6 ARC

Purchased this for a 6 ARC build Works flawlessly easy to clean paired with a Armaspect silent buffer system not one FTF or jam, remember if using Armaspect buffer remove your detent to prevent bolt bounce. Will be adding another for a 22ARC build AS always fast shipping

G
GERARD NEVILLE
AT3 had it in stock. Perfect for my build

Perfect for my 6MM ARC build. Worked great!! Gun shoots 5/8 inch 5 shot groups at 100 yards.

Thank you for your review! We're glad to hear that the AT3™ AR-15 Bolt Carrier Group was perfect for your 6MM ARC build and that it worked great. It's always great to see our products performing well in the field. Happy shooting!

R
Ryan Hall
BCG

Nickel boron BCG

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