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Bexar Arms M16 9310 5.56 Bolt Carrier Group - Black Nitride

Bexar Arms

MSRP: $179.99
Our Price: $159.99
(You save $20.00 )
(5 reviews) Write a Review

Out of Stock

As the main reciprocating component of the action, the Bolt Carrier Group is critical to the reliable function of your AR-15 or M16.

We take extreme care in making sure our BCG's are of the best quality possible for the most reliable function possible. Each BCG is individually gauged and inspected to ensure that all tolerances are met and exceeded. Because we gauge each BCG individually and hold extremely tight tolerances, we've chosen to use Helical Gas Rings for a more complete seal between the carrier and the bolt. Other manufacturers use carriers that were spec'd for chrome lining for their nitride carriers as well which leads to loose gas ring chambers, bolt tail seals, and bolt shoulder supports. We spec our nitrided carriers specifically to be nitrided, so our gas ring chamber, bolt tail seal, and bolt shoulder support is toleranced to account for the lack of a thick buildup of chrome. Our BCG will never fail the "gas ring test" with our Helical Gas Rings when new, guaranteed.

We install and dimple stake our gas keys in house to ensure that the gas key screws are torqued correctly, that the bottom of the gas key is flat, and that there's sealant used between the gas key and the carrier. We use OCKS screws for their improved design that accepts staking better than MilSpec screws which increase their resistance to backing out under harsh conditions.

All of this attention to detail and small improvements culminates into a BCG that is ready for anything you can put it through. If you're serious about quality, our BCG will not disappoint!


  • Individually Gauged and Inspected In House
  • Machined and Toleranced Specifically to be Nitrided
  • Compatible with 5.56, .223, 300 Blackout, 350 Legend, etc.
  • 9310 Bolt
    • Black Nitrided
    • Shot Peened, Properly Heat Treated, and MPI Inspected
    • Inconel X750 Extractor Spring
    • Inconel X750 Ejector Spring
  • Billet Extractor
    • Billet 4140 Steel
    • Phosphated
    • Extractor Viton O-Ring included
  • 8620 Carrier
    • Back Nitrided
    • Full Auto M16 Profile
  • 4140 Billet Gas Key
    • Black Nitrided
    • Sealed to Carrier
    • "Decked" before Installation
    • Dimple Staked In House with OCKS Screws
  • 4140 Billet Cam Pin
    • Black Nitrided
  • Enhanced Helical Gas Rings
    • We have been made aware of an occasional issue with some helical gas rings becoming sticky after shooting. For the time being, all BCG's will come with standard gas rings while we resolve this issue.
    • Guaranteed to pass the "Gas Ring Test" with our Carriers
  • Mil-Spec Firing Pin
    • Swiss Turned from 8640 Steel
    • Hard Chrome Plated
  • 100% Made in USA

5 Reviews Hide Reviews Show Reviews

  • 5
    9310 bcg

    Posted by Jackson Blackwell on Mar 11th 2023

    Sweet logo great bcg and awsome customer service. Buy in confidence.

  • 5
    The only BCG I will use for AR builds now

    Posted by Mike A on Dec 20th 2022

    Can't complain. Phil meticulously inspects and ensures gas keys are properly installed. Fit and finish are flawless. There is absolutely nothing wrong with this BCG.

  • 5
    Nitride bolt carrier group

    Posted by Bryson on Dec 15th 2022

    This is hands down the nicest BCG I have ever come into contact with or even seen… it’s not even close. We’ll see where we’re at when I hit 5k with it but I have high hopes. The craftsmanship is second to none and it’s very fairly priced

  • 5
    Very nice bcg

    Posted by Casey on Jun 19th 2022

    This bcg is going to be my go to from now on. Finish is absolutely perfect, OCK’s screws, and attention to detail like flatting the gas key to help ensure a sealed carrier. Flawless.

  • 5
    Awesome BCG

    Posted by Bryan on Jan 13th 2022

    After receiving and looking over this BCG carefully, it’s among my favorites. Previously the only BCG I’d use was Sionics and I’d rank this Bexar Arms right up there at the top of my favorites list now. I love the attention to detail, the OCKS screws, the beautiful staking, the finish is the nicest nitride I’ve seen on any part. The machine work is great and I find comfort in knowing that Bexar Arms has gauged them and inspected them so throughly, sealed the gas key, used good springs, etc to ensure it’s the using all the best components and assembly techniques.