FAXON 9310 .458 SOCOM/.450 BUSHMASTER BOLT - .125 - NITRIDE
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Faxon
FAXON 9310 .458 SOCOM/.450 BUSHMASTER BOLT - .125 - NITRIDE
Faxon 9310 .458 SOCOM / .450 Bushmaster Bolt (.125) – Nitride
Category: Rifle Parts
Platform: AR15
Series: Bolts
Caliber/Cartridge: .458 SOCOM, .450 Bushmaster
SKU: FF458BCNITRIDE | UPC: 816341024175
MSRP: $86.00
The Faxon 9310 .458 SOCOM / .450 Bushmaster Bolt (.125) – Nitride is a premium AR-15 replacement bolt designed for big-bore performance and dependable cycling. Seeing “MIL-SPEC” as just the starting point, Faxon pairs high-strength materials with enhanced inspection and a durable surface treatment to deliver consistent reliability.
Each bolt is machined from 9310 tool steel, fully heat-treated, shot-peened, and Magnetic Particle Inspected (MPI) to help ensure material integrity. The bolt receives a salt bath nitride finish to increase surface hardness, decrease resistance, and provide excellent corrosion resistance compared to typical phosphate finishes. Bolt lugs are chamfered to support smooth feeding and reliable function—even under demanding loads and fast actions.
The extractor is manufactured from S7 tool steel, fully heat treated, and shot peened per MIL-SPEC to support consistent extraction in hard-running builds.
Detailed Specifications
Bolt
- 9310 Tool Steel Construction
- Full MIL-SPEC Heat Treatment
- Shot Peened to MIL-SPEC
- Magnetic Particle Inspection (MPI)
- Back of lugs chamfered for reliability
- Salt Bath Nitrided
Extractor
- S7 Tool Steel Construction
- Fully Heat Treated
- Shot Peened per MIL-SPEC
Frequently Asked Questions
What does “.125” refer to?
“.125” refers to the bolt face depth specification used by many AR-15 barrels for .458 SOCOM and .450 Bushmaster. Always confirm your barrel’s required bolt type and headspace.
Is this bolt MPI tested?
Yes. Faxon bolts are MPI tested to help verify material integrity and quality.
Why choose nitride over phosphate?
Salt bath nitride increases surface hardness and corrosion resistance while reducing friction—often improving smoothness and easing cleaning.
Warranty
Faxon Firearms products are backed by our Lifetime Guarantee to the original purchaser against defects in materials and workmanship. For full terms, exclusions, and RMA instructions, visit: Faxon Warranty Policy.
Warranty: Faxon Firearms products are backed by our Lifetime Guarantee to the original purchaser against defects in materials and workmanship. Warranty service requires an RMA and proof of purchase. Full terms, exclusions, and instructions:
https://faxonfirearms.com/warranty-privacy-terms/
