FAXON 18" 8.6MM/.338 BORE MEDIUM SPORTER PROFILE 1:3T BARREL BLANK
Faxon
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Faxon
FAXON 18" 8.6MM/.338 BORE MEDIUM SPORTER PROFILE 1:3T BARREL BLANK
Faxon Profiled Barrel Blank — 18" 8.6mm / .338 Bore Medium Sporter (1:3 Twist) — Built for 8.6 Blackout
416-R stainless • Button rifled • Honed & lapped • Fully stress relieved • MPI inspected • 1:3 twist optimized for 8.6 BLK builders
The Faxon 18" 8.6mm / .338 Bore Medium Sporter Barrel Blank is a purpose-driven foundation for 8.6 Blackout builders who want the flexibility of a gunsmith-ready blank without compromising the core design intent of the cartridge. With an extremely fast 1:3 twist, this blank is built to support the projectile stabilization goals that make 8.6 BLK unique.
Made from premium 416-R stainless steel, each blank is button rifled, honed and lapped, and fully stress relieved for uniform internal geometry and long-term dimensional stability. The Medium Sporter profile balances field-friendly handling with enough rigidity for consistent performance, making it a strong fit for modern 8.6 BLK hunting and suppressed builds.
Important Intended-Use Notice (Read Before Chambering):
Due to the extremely fast 1:3 twist, Faxon advises against chambering this blank in any caliber other than 8.6 Blackout. This blank has been tested and optimized specifically for 8.6 BLK. For safety and best results, follow this guidance when planning your custom build.
Key Benefits for 8.6 Blackout Builders
- Dedicated 1:3 twist for 8.6 BLK: Optimized around the cartridge’s stabilization intent and use case.
- 416-R stainless steel: Consistent, machinable, and a proven choice for precision barrel work.
- Honed & lapped bore: Enhanced internal finish for consistency and easier maintenance.
- Fully stress relieved: Helps preserve geometry during machining and firing cycles.
- MPI inspected: Magnetic particle inspection for confidence in material integrity.
- Medium Sporter contour: Balanced handling for hunting and practical suppressed configurations.
Builder Notes
- Ships unchambered & unthreaded: Final chamber, tenon, gas system decisions (if applicable), and muzzle threads are selected by your gunsmith.
- Plan around your use case: 8.6 BLK is often built for suppressed use and hunting. Confirm your muzzle device/suppressor requirements before final machining.
- Use quality components: Proper headspacing, concentricity checks, and safe load selection are essential for any custom build.
Specifications
Note: Barrel blank ships unchambered and unthreaded. Final dimensions, chambering, contouring, threading, and finishing are the responsibility of the gunsmith or end user.
Frequently Asked Questions
Is this barrel blank chambered or threaded?
No. This blank ships unchambered and unthreaded. Your gunsmith will cut the chamber, tenon, and muzzle threads to match your action and intended build.
Is this blank intended for cartridges other than 8.6 Blackout?
Faxon advises against chambering this blank in any caliber other than 8.6 Blackout due to the extremely fast 1:3 twist. This blank has been tested and optimized specifically for 8.6 BLK.
Why does 8.6 Blackout use such a fast 1:3 twist?
8.6 BLK is often built around stabilizing longer .338 projectiles and achieving the performance goals that define the cartridge. The 1:3 twist is purpose-driven to support that design intent.
What does “honed and lapped” mean?
Honing and lapping improve bore surface finish and uniformity, which can support excellent accuracy potential, consistent performance, and easier cleaning once the barrel is finished.
Warranty: Backed by the Faxon Lifetime Guarantee. Full details: https://faxonfirearms.com/warranty-privacy-terms/
Backed by the Faxon Lifetime Guarantee. Full warranty details, exclusions, and terms:
https://faxonfirearms.com/warranty-privacy-terms/
