
Faxon Firearms 16 inch Gunner Barrel - 5.56 NATO - Mid-Length - 4150 QPQ
Black Nitride Faxon BCG for 5.56, .300 BLK, and .350 Legend
This Faxon Firearms Bolt Carrier Group is a complete high-quality BCG upgrade designed for AR15/M16 platforms chambered in 5.56×45 NATO/.223 Remington. It maximizes performance and reliability, and features a durable, slick Black Nitride that will look right at home on any black rifle.
Black nitride promotes superior corrosion resistance as well, and helps in increasing surface hardness and lubricity for a smoother function and easy cleaning.
Shot-Peened & MPI Tested
The Faxon Firearms 5.56 M16 Complete Bolt Carrier Group is made from 9310 tool steel, shot-peened, and magnetic particle inspected to military specifications ensuring the highest quality with no hidden cracks or stress points that may compromise safety.
Its bolt lugs are also chamfered to ensure reliable action for high-pressure hand loads and fast lightweight actions. Furthermore, this BCG is full-Auto rated and maintains the trip for full-auto fire control groups and new multi-stage trigger systems.
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 Nitride Bolt & Carrier
- S7 Extractor
- Superfinished Carrier Body
- Full Auto Compatible
- Forward Assist Serrations
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.
Faxon Firearms Warranty
We do understand that life happens and that often a purchase will need to be returned. Customers may return any product, for any reason, in line with the requirements & policies below.
For any errors on Faxon’s part, after notification from the customer, Faxon will dispatch a Fed-Ex Ground label for the return of the product. Upon receipt and inspection at Faxon, a replacement will be sent to the customer via Fed-Ex Ground with tracking information sent to the customer.
REQUIREMENTS
- Faxon will only refund products purchased directly through Faxon Firearms.
- If you purchased a product through one of Faxon’s authorized dealers and would like to return the product for a refund, you must contact the dealer for your refund.
- Merchandise must be in new condition with original packaging
- Merchandise must be return-shipped in a protective box
- A full refund including shipping if the return resulted from our error, otherwise we will deduct the shipping costs from the refund.
- All product replacements done under warranty can be handled by Faxon directly.
- The customer will receive a refund within 10 business days of our receiving your return. The refund issued in the same form of payment used for purchase.
- No return will be granted for a product that is modified in any way
- No returns for refund after 30 days from the delivery date of the product.
- There will be a 15% restocking fee on all returns.