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Questions & Answers
Is the gas key staked? Expert Answer

The Faxon Firearms 458/ 450 M16 Bolt Carrier Group gas key is staked.

by Hunter, Gear Expert, August 25, 2022
Is 458 and 458 socom the same thing? Manufacturer Answer

The "458" in the name of this BCG refers to .458 Socom which this BCG is compatible with. The BCG is not compatible with other .458" caliber cartridges.

by Faxon Firearms, Manufacturer, August 27, 2021
Customer Reviews
Most Recent Reviews
Best quality and pricing by grunt07, Verified Owner, June 21, 2025
Ive never had any issues with Faxon parts.Most of my builds are Faxon barrels and BCGs.I feel like they use good quality materials in their parts and their stuff is made here in the US.Also when a company takes the time to put their name on the actua...
Read More...
Most Recent Reviews
Excited to try it out by OBSIDIAN, Verified Owner, August 7, 2023
BCG looks fine and I've heard good things about Faxon. I'm a little concerned about the lug walls on the bolt being thin, since that's a big issue for the 7.62x39 bolts on the market. We'll see how it goes though.
Read All 2 Reviews

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Color:
Black
Finish:
Nitrided
Caliber:
.450 Bushmaster, .458 SOCOM
Gun Make:
Colt
Gun Model:
M16
Condition:
New

Code: 11I-BCG-FF209-FF458BCGCNITRIDE

MPN: FF458BCGCNITRIDE

UPC: 816341024182

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Product Info for Faxon Firearms 458/ 450 M16 Bolt Carrier Group

Seeing in MIL-SPEC in 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, & in Crane in O-Ring Installed Salt Bath Nitrided Bolt & Carrier S7 Extractor Superfinished Carrier Body Full Auto Compatible Forward Assist Serrationsimage

WARNING: California`s Proposition 65

Specifications for Faxon Firearms 458/ 450 M16 Bolt Carrier Group:

Manufacturer: Faxon Firearms
Color: Black
Finish: Nitrided
Fabric/Material: 9310 Tool Steel
Carrier Material: 8620 Steel
Bolt Material: 9310 Steel
Caliber: .458 SOCOM, .450 Bushmaster
Gun Make: Colt
Gun Model: M16
Condition: New

Package Contents:

  • Faxon Firearms 458/ 450 M16 Bolt Carrier Group (BCG)

Faxon Firearms 458/ 450 M16 Bolt Carrier Group Orderable Models

List of Orderable Models

  • Faxon Firearms 458/ 450 M16 Bolt Carrier Group BCG, Nitrided, FF458BCGCNITRIDE , MPN: FF458BCGCNITRIDE , UPC: 816341024182 , Code: 11I-BCG-FF209-FF458BCGCNITRIDE
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