Faxon 5.56 M16 Bolt Carrier Group, Nitrided

Faxon 5.56 M16 Bolt Carrier Group, Nitrided

(17 reviews) Write a Review

Seeing "MIL-SPEC" as just the starting point, we set out to ensure the best options are available for our demanding customers. 

Improvements include using 9310 tool steel for the bolt, nitriding the assembly to increase surface hardness, decrease resistance, and have superior corrosion resistance compared to typical chrome and phosphasted bolt carrier groups. All bolts are fully MPI tested to ensure the material is sound and without defects. Bolt lugs are chamfered 45 degrees to ensure reliable action for even the highest pressure hand loads and fast lightweight actions. 

Faxon Bolt Carrier Groups are Superfinished to reduce friction, increase smoothness of operation, and reduce fouling. Further, they are full-Auto rated and maintain the trip for full-auto fire control groups and new multi-stage trigger systems. Gas keys use grade 8 fasteners and are fully staked for a lifetime of service. 


Detailed Specifications:

  • 9310 Tool Steel Bolt
  • Full MIL-SPEC Heat Treatment
  • Shot Peened to MIL-SPEC
  • Magnetic Particle Inspection (MPI)
  • Back of Lugs Chamfered for Reliability
  • Spring, Insert, & "Crane" O-Ring Installed
  • Salt Bath Nitrided Bolt & Carrier
  • S7 Extractor
  • Superfinished Carrier Body
  • Full Auto Compatible
  • Forward Assist Serrations


Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

17 Reviews Hide Reviews Show Reviews

  • 5.56 BCG

    Posted by Arthur Wiggins on Sep 4th 2018

    High quality part at an incredible low MSRP.

  • Faxon 5.56/300 BLK BCG Complete-Ntride

    Posted by William S. on Jan 23rd 2018

    First build using Faxon products. I am amazed by fit and finish of BCG barrel and gas block. Finished barrel break in today without failure and accuracy was great from the start. Spent cases all landed within 12 inches of each other. Quality surpasses most of more expensive components I have used in past. Most impressed!

  • Affordable Excellence

    Posted by Shwell on Jan 23rd 2018

    Great BCG with all the necessary features, along with added bonuses that makes this BCG an easy choice for future builds. The right materials in the right places and an attention to Detail often missing at this price point by other competitors. Well over 2000 problem free rounds.

  • 10/10 it is a Top quality BCG, Which run more than 1000 round without a malfunction!! I would definetly order more.

    Posted by Abraham on Jan 11th 2018


  • First time buyer, very impresed

    Posted by Wayne Liskey on Dec 18th 2017

    I matched this BCG to a 16'' match pencil barrel and the preformance is just as goo as the product looks....perfect!

  • Quality BCG

    Posted by aDarnGoodJoe on Oct 17th 2017

    As with everything made by Faxon, this is a quality BCG. Everything appears to be machined and finished properly. Staking is well done. I expect this BCG will provide excellent service for many years to come.

  • Faxon 5.56/300 BLK M16 Bolt Carrier Group - Complete

    Posted by John Mullikin on Sep 26th 2017

    Purchased with barrel, very pleased, excellent quality

  • Faxon 5.56/300 BLK M16 Bolt Carrier Group - Complete - Nitride

    Posted by Steve Fay on Sep 20th 2017

    Excellent product product, it is equal to all other out but there bar none.

  • Finish on this bolt is second to none.

    Posted by StateTrooper on Jul 21st 2017

    I love this bolt and how perfectly smooth the coating is. Compared to my TiN bolt it isn't quite as wet or slippery but I know it won't get stained like that bolt will. Only used the bolt a little but it ran great surpressed even dry out of the box. I'm impressed!

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