The Faxon Firearms Match Series Big Gunner 8.6 Blackout 16" Bead Blast 416-R Stainless Barrel (Part # 10B863C16NGMHL5RNP3, UPC 816341028609) is a premium AR-10 barrel engineered to squeeze every bit of performance out of the revolutionary 8.6 Blackout (8.6 BLK) cartridge. Built from 416-R stainless steel, featuring a Big Gunner contour, 1:3" twist rate, and 5R button rifling, this 16" match barrel delivers brutal downrange energy, excellent accuracy, and rock-solid reliability for serious builders and shooters. MidwayUSA+1
If you’re building a precision 8.6 Blackout AR-10 for hunting, suppressed use, or long-range steel, this Faxon Match Series barrel is purpose-built to help you get there.
Designed in Collaboration with Q for 8.6 Blackout
Faxon Firearms developed this barrel in partnership with Q, the originators of the 8.6 Blackout concept. Elk River Guns+1
Optimized specifically for 8.6 BLK – not just a re-chambered .308 barrel.
The extreme 1:3" twist rate channels rotational energy into the bullet, dramatically increasing energy transfer and terminal performance at the target. performancetriggers.com+1
Ideal for both subsonic and supersonic loads, especially with heavy projectiles that 8.6 BLK is known for.
This collaboration ensures your barrel is built around the actual design philosophy of the cartridge, not just its dimensions.
16" Big Gunner Contour – Balance of Rigidity and Weight
The Big Gunner profile is Faxon’s hybrid contour that blends the best elements of heavier and lighter barrel designs: MidwayUSA+1
16" length hits the sweet spot for maneuverability and velocity in 8.6 Blackout.
Enough steel forward of the chamber to maintain stability and heat control, while slimming down toward the muzzle to keep the rifle from becoming front-heavy.
Perfect for hunting rigs, tactical builds, and suppressed carbines where you want a serious barrel without the clumsy feel of a full bull profile.
The result is a barrel that’s easy to carry and shoulder, yet maintains the rigidity you want from a match-grade AR-10 setup.
416-R Stainless Steel with Bead Blast Finish
This Match Series Big Gunner barrel is machined from 416-R stainless steel, a high-end barrel steel favored in precision applications: MidwayUSA+1
416-R stainless offers excellent machinability for precise rifling and chamber work, plus strong corrosion resistance in all weather.
Bead blast finish gives the barrel a low-glare, matte stainless look that’s both attractive and practical in the field. Blackstone Shooting Sports
Whether you’re shooting in rain, snow, or summer heat, this barrel is built to resist harsh conditions and maintain consistent performance.
Aggressive 1:3" Twist with 5R Button Rifling
One of the defining features of this barrel is its 1:3" twist rate—much faster than traditional big-bore AR barrels: performancetriggers.com+1
Designed specifically to stabilize extremely heavy bullets used in 8.6 BLK, including long subsonic projectiles.
Channels huge amounts of rotational energy for devastating terminal performance on game and steel alike.
Paired with 5R button rifling, the barrel offers: MidwayUSA+1
Reduced bullet jacket deformation for improved accuracy.
Less fouling and easier cleaning due to gentler land-to-groove transitions.
Consistent gas seal and velocity shot after shot.
The twist and rifling combination make this barrel ideal for suppressed use, hunting large game, and precision shooting at mid to extended ranges.
Match-Grade Manufacturing: Stress-Relieved, Air-Gauged & MPI
Faxon’s Match Series barrels undergo a rigorous production and inspection process: performancetriggers.com+2AR15Discounts+2
Fully stress-relieved after rifling to minimize internal stress that can cause POI shift as the barrel heats.
Air-gauge tested to verify uniform bore dimensions and tight tolerances.
Magnetic Particle Inspected (MPI) to detect potential material defects.
Finished with an 11-degree target crown to promote clean, consistent gas release at the muzzle for maximum accuracy.
These steps ensure a barrel that’s built to a match standard and ready for serious work right out of the box.
AR-10 / LR-308 Compatibility & Gas System Details
The Faxon Match Series Big Gunner 8.6 BLK barrel is designed to integrate seamlessly into common large-frame AR builds: MidwayUSA+1
Platform: AR-10 / LR-308–style uppers (DPMS Gen 1 pattern extension).
Gas system: Carbine-length gas for reliable cycling with both supersonic and properly tuned subsonic loads. Gritr Sports+1
Gas block journal: 0.875" diameter, compatible with a wide range of low-profile gas blocks. MidwayUSA
Threads: M18x1.5 at the muzzle, ready for brakes, flash hiders, or QD suppressor mounts designed for large bores. MidwayUSA+1
This makes it easy to drop into a quality AR-10 upper and configure for your choice of muzzle device and gas system components.
Built for Suppressed, Hunting & Precision Roles
With its 16" length, aggressive twist, and match-grade build, this barrel shines in several roles:
Suppressed 8.6 BLK carbines – The fast twist and heavy bullets excel with subsonic loads, delivering quiet, hard-hitting performance for tactical and hunting use.
Big-game hunting rigs – Perfect for hogs, deer, and similar game where energy on target and deep penetration are critical.
Precision gas-gun builds – The Match Series pedigree makes it suitable for long-range steel and practical precision matches that leverage big-bore ballistics.
If you want a large-frame AR that hits harder than 5.56 or 6.5 but still benefits from modern projectile design, 8.6 BLK with this Faxon barrel is a compelling combo.
Key Specifications – Faxon Match Series Big Gunner 8.6 BLK 16" Barrel
From current distributor and retailer data: MidwayUSA+2Elk River Guns+2
Manufacturer: Faxon Firearms
Model: Match Series Big Gunner
Part Number: 10B863C16NGMHL5RNP3
UPC: 816341028609
Caliber: 8.6 Blackout (8.6 BLK)
Platform: AR-10 / LR-308 (DPMS Gen 1–style extension)
Barrel Length: 16"
Material: 416-R stainless steel
Finish: Bead blast
Twist Rate: 1:3"
Rifling: 5R button rifled
Contour: Big Gunner
Gas System: Carbine-length
Gas Block Diameter: 0.875"
Muzzle Threads: M18x1.5
Crown: 11-degree target crown
Quality Checks: Stress-relieved, air-gauge tested, Magnetic Particle Inspected
These specs make it easy to verify that this is the correct Faxon Match Series Big Gunner 8.6 Blackout 16" barrel for your next AR-10 build.
Why Choose the Faxon Match Series Big Gunner 8.6 BLK 16" Barrel?
This barrel is a fantastic choice if you:
Want to build a high-end 8.6 Blackout AR-10 that fully leverages the cartridge’s strengths.
Prefer 416-R stainless with a bead-blasted, low-glare finish for durability and style.
Need an extremely fast 1:3 twist and 5R rifling optimized for heavy, energy-dumping bullets.
Value a match-grade manufacturing process—stress-relieved, air-gauged, and MPI—for accuracy and reliability.
Are building a rifle for suppressed shooting, big-game hunting, or precision gas-gun work and want a proven barrel from a respected manufacturer.
For shooters who demand serious performance from their big-bore AR-10, the Faxon Firearms Match Series Big Gunner 8.6 Blackout 16" Bead Blast 416-R Stainless Barrel (10B863C16NGMHL5RNP3 / 816341028609) delivers the accuracy, energy, and build quality needed to run hard in the field, on the range, or in competition.
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