FAXON 18" 8.6MM/.338 BORE BULL PROFILE 1:3T BARREL BLANK
Faxon
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Faxon
FAXON 18" 8.6MM/.338 BORE BULL PROFILE 1:3T BARREL BLANK
Faxon Profiled Barrel Blank — 18" 8.6mm / .338 Bore Bull Profile (1:3 Twist) — Built for 8.6 Blackout
416-R stainless • Button rifled • Honed & lapped • Fully stress relieved • MPI inspected • Bull contour • 1:3 twist optimized for 8.6 BLK builders
The Faxon 18" 8.6mm / .338 Bore Bull Profile Barrel Blank is a purpose-driven foundation for 8.6 Blackout builders who want maximum rigidity and consistency from a gunsmith-ready blank. Featuring an extremely fast 1:3 twist, this blank is engineered around the projectile stabilization goals that make 8.6 BLK unique.
Starting with 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 Bull profile adds stiffness and thermal mass, helping support repeatable performance for precision-oriented, suppressed, and high-use 8.6 Blackout 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 8.6 Blackout’s design intent and typical projectile use.
- Bull profile rigidity: Maximum stiffness and thermal stability for repeatable performance.
- 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.
Builder Notes
- Ships unchambered & unthreaded: Final chamber, tenon, and muzzle threads are selected by your gunsmith.
- Suppressed build planning: Confirm your muzzle device/suppressor system and thread requirements before final machining.
- Quality checks matter: Proper headspacing, concentricity verification, 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 choose a Bull profile for an 8.6 BLK build?
A Bull contour increases stiffness and thermal mass, which can support more consistent performance and heat management in precision-oriented, suppressed, or high-use configurations.
What ensures the bore quality on this blank?
Each blank is button rifled, honed and lapped, fully stress relieved, and MPI inspected to support uniformity, stability, and confidence during your build process.
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/
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