AR-15 Bolt Carrier Groups (Sale)

Faxon Firearms 5.56 LIGHTWEIGHT 9310 Bolt Carrier Group Complete – Nitride

Price – $209.95

When looking at lightweight bolt carrier groups, we were unsatisfied with what the market had to offer. Seeing a capability gap, we set out to create a bolt carrier group that could live up to the GUNNER name with no compromise in strength or function. We set specifications that would allow no compromise:

  1. Lightest Weight Possible (8.5 Ounces Complete, 6.24 Ounces Carrier & Key Only)
  2. MIL-SPEC Materials & Finishes or Better
  3. Forward Assist Serrations
  4. Compatible with Dust Covers
  5. Maintains Full-Auto Trip Sear for full-auto and the new multi-stage trigger functionality
  6. Looks Amazing

Matching our barrels, we selected the QPQ method of Salt Bath Nitride for all the carriers components. By coating all parts, the carrier’s natural slickness is increased markedly requiring less gas and pressure to operate. Further, the QPQ SBN process seals components against corrosion while making them fantastically wear-resistant.

Improvements include using 9310 tool steel for the bolt, which is stronger and nitriding the assembly to increase surface hardness, decrease resistance, and have superior corrosion resistance compared to typical chrome and phosphate 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 the 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.

As a testament to our confidence, the carriers are all laser-engraved with the Faxon Shield after passing all Quality inspections.

Faxon recommends the use of an adjustable gas block with our Gunner lightweight BCG for proper function.

Detailed Specifications:


  • 9310 Tool Steel Construction (Stronger than C158)
  • 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
  • QPQ -?Salt Bath Nitrided


  • 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
  • Weight w/ Key (Not Bolt or any Pins): 6.32 Ounces

?Cam Pin:?

  • 4140 Pre-Hardended Steel Material
  • QPQ -?Salt Bath Nitrided
WEIGHT0.0000 oz
BOLT FINISHNitride / Melonite
FINISHNitride / Melonite

CMMG 22LR AR Conversion Kit, Bravo, w/ 3 10rd Magazines

Price – $189.95

Just swap this drop-in conversion with the bolt carrier group from your 5.56/.223 chambered rifle and you will be ready to shoot .22LR. Ships with 3 10rd magazines.  For best performance use a round style hammer as notched hammers can cause function issues and 36 grain plated nose bullets have proven to be the best choice for function.

All Stainless Steel Construction, includes 3 10rd Magazines.

Works in most 5.56/.223 chambered rifles.

NBS .223/5.56 Bolt Carrier Group – Black Nitride

Price – $104.95

The NBS .223/5.56 Black Nitride Bolt Carrier Group was designed with strength in mind. Starting with a 9310 Steel Bolt, which is aircraft-grade material, this bolt has a high core strength rating, a high fatigue strength, and a high hardenability rating. 9310 steel, when treated properly, is about 7% better than Carpenter 158 steel, so you know that you will have a dependable BCG, when you drop this into your rifle.

This NBS BCG (Bolt Carrier Group) has been Nitrided, so that it can provide a long-lasting experience, and provide a significant upgrade to your AR-15. These bolts have also been Magnetic Particle Inspected and have been made to Mil-Spec Standards. It also has Mil-Spec 8740 Steel hard-chromed Firing Pins, Mil-Spec Gas Keys with Grade-8 screws that are staked and sealed with Permatex No.3. Plus, with the AR15Discounts satisfaction guarantee, you can buy your AR build components without apprehension. Our guarantee says if you are unhappy for any reason, you can send it back to us within 30 days for a full refund. No worries.

NOTE- The Salt Black Nitride BCG offers the dark, subdued finish that doesn’t change the specs of the Bolt Carrier, but it still makes the outside of the Bolt Carrier harder. This treatment increases the longevity of the part, makes it extremely wear resistant and durable, and this treatment protects the part from corrosion.

Technical Specs:
•    Gas system: Direct Impingement
•    Caliber: 5.56x45mm NATO/.223 Rem, .300 Blackout
•    Finish: Salt Black Nitride
•    Bolt: 9310 Alloy Steel (High Hardness)
•    Carrier: 8620 Aircraft Grade Steel
•    Extractor: Shot Peened and Case Hardened D2 Tool Steel
•    Firing Pin: Mil-spec 8740 steel with hard chrome finish
•    Gas Key: Mil-Spec w/ properly staked Grade-8 screws & Permatex No. 3 sealed
•    Cam Pin: 8620 Steel w/ Black Nitride Finish
•    Quality Control: MPI Inspected for QC

WEIGHT0.0000 oz
BOLT FINISHNitride / Melonite
FINISHNitride / Melonite

AR15 DISCOUNTS – 5% Off Of Your Order / Code – GUNDEALS5

Wilson Combat .223/5.56/300 BLK M16 Profile Bolt Carrier Group – Nickel Boron

Price – $179.95

Manufactured by our finest domestic, Mil-Spec contractors these are among the best AR rifle bolts on the market and the same bolt carrier groups we use as the basis of our renowned custom rifles!

The bolt is precision machined from aerospace grade 9310 tool steel, shot peened for increased strength and includes a tool steel extractor and ejector, appropriate extractor spring, and is MPI (Magnetic Particle Inspected) and randomly batch HPT (High Pressure Tested).

The extractor is 4140 gun quality, annealed, cold drawn steel per the Mil-Spec.

With a complete Black Nitride finish, the 8620 steel carrier includes a proper machined Mil-Spec gas key secured to the carrier via Grade 8 fasteners and properly staked in our shop during final inspection.

The super hard Black Nitride Finish is an advanced, lower friction surface treatment that minimizes the need for excessive lubricants and cleaning and will look like new for years and will never peel, flake or chip.

These precisely machined, finished and hardened parts will ensure long term proper gas system functioning and reliability.

All experienced AR shooters know that the best spare parts kit for an AR-15 rifle is a spare complete bolt carrier assembly!

NOTE- The only difference between “semi-auto” and “full-auto” carriers are the carrier weight and external profile. The “full-auto” carrier is slightly heavier to provide more mass and lower cyclic rate that can benefit carbine length and shorter gas systems, short barreled/suppressed rifles and machine guns. The “semi-auto” carrier is slightly lighter to provide the least amount of recoil impulse for rifle length gas systems and it’s design makes reinstalling the firing pin easier after cleaning.

Both carrier types are considered completely interchangeable and there are no restrictions on the ownership of a “full auto” carrier group in a semi-automatic rifle.


  • Bolt material is aerospace grade 9310 MPI inspected
  • Mil-Spec parts ensure a long service life
  • Machined ejector and extractor per mil specs
  • Full Auto carrier (see note)
  • Drop in fit for any quality 5.56 case head based AR rifle (.223/5.56 NATO, .300 Blackout, .204 Ruger,300 HAM’R, or 7.62X40 WT)
  • Also Available Finish: Nickel Boron

Bootleg Inc Four Position Adjustable AR-15 Bolt Carrier Group

Price – $181.95

Complete Bolt carrier group, Machined from S7 Tool Steel, Lithium Isonite Coating, 4 Setting Adjustable Vent System relieves excess gas pressure created from suppressor use creating longer dwell time and less blowback to the shooter. Gas Adjustment can be turned while installed in the rifle, Uses all standard Mil- Spec components Staked Mil Spec Gas Key, Adjustment Pin is easily removed for cleaning Full Auto Rated

Weight 11.40 oz

WEIGHT0.0000 oz
BOLT FINISHLithium Isonite
FINISHLithium Isonite