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Faxon Firearms Complete Nitrided Bolt Carrier Group

MSRP $145.00
SALE PRICE: $137.75
Savings: $7.25

Stock Status :IN STOCK

Product Code: FF556BCGCNITRIDE

Add RCA Adjustable Gas Key?



Detailed specifications of this nitride-finished complete BCG from Faxon include:

  • Bolt
    • 9310 Tool Steel Construction (Stronger than C158)
    • Full MIL-SPEC Heat Treatment
    • Shot Peened to MIL-SPEC
    • Magnetic Particle Inspection (MPI)
    • Back of Lugs Chambered for Reliability
    • Spring, Insert, & "Crane" O-Ring Installed
    • QPQ - Salt Bath Nitrided
  • Extractor
    • S7 Tool Steel Construction
    • Fully Heat Treated
    • Shot Peened Per MIL-SPEC
    • QPQ - Salt Bath Nitrided
  • Carrier & Key
    • Superfinished Carrier
    • Carrier: MIL-SPEC 8620 Steel Material
    • Key: 4140 Steel Material
    • Fully Heat Treated
    • Forward Assist Serrations
    • M16 (FULL-AUTO) Compatible
    • Grade 8 Fasteners
    • Fully & Properly Staked Key, Permatex Sealed
    • QPQ - Salt Bath Nitrided
  • Cam Pin
    • 4140 Pre-Hardended Steel Material
    • QPQ - Salt Bath Nitrided

Average Rating: 1 of 5 Total Reviews: 1 Write a review »

  1 of 1 people found the following review helpful:
Garbage April 13, 2018
Reviewer: Dan W. from KS United States  
I purchased this Faxon BCG to match the Faxon barrel in my most recent build. This BCG is more expensive that my usual BCG's but I wanted a more "premium" BCG for this build. It turned out to be an overpriced piece of garbage. On my first range trip I fired 120 rounds of American Eagle and when I got home I noticed the gas key had become extremely loose! I contacted Faxon and sent the BCG in on warranty. I received a reply from Faxon customer service stating that they are aware that a batch of their BCG’s went out improperly torqued and staked. It has been over a month now and I still do not have my wonderful “premium” Faxon BCG.  Faxon Customer Service has ignored my last eight emails, a website message, and a Facebook message from me requesting an update on my warranty claim or a tracking number. A month ago I was a Faxon “fanboy” but after my experiences around this defective BCG and more so the pathetic customer service, I will be looking elsewhere for my future needs.


Very sorry for the discrepancy.  If you are not getting anywhere with the manufacturer, then you can always reach out to us at RTB and we'll get it sorted out.  Emailing you now and contacting faxon.


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