Faxon Duty Series Barrel LR-308 8.6 Blackout Big Gunner Contour 1 in 3″ Twist M18x1.5 LH Thread Tapered Shoulder with Adapter Nitride


Category: Product ID: 15553


Faxon Firearms is proud to partner with Q on the development of barrels for their revolutionary round, the 8.6 Blackout (8.6 BLK). With barrels employing an impressive 1:3 twist rate, 8.6 BLK channels rotational energy to increase energy on-target.


The Faxon Duty Series Gunner Barrel is manufactured 100% in-house from cradle-to-grave. The barrel is machined from certified 4150 GBQ steel with QPQ nitride coating for added durability and longevity. Each barrel is magnetic particle inspected (MPI) to ensure perfect surfaces and sub-surfaces as well as air-gauge tested to ensure superior accuracy. The Faxon Big Gunner is button rifled and features a medium-taper behind the gas block and a gas block journal set to .750″, making it compatible with most common gas blocks. From the gas block journal forward Faxon uses a thinner taper, which is designed to reduce weight yet maintain rigidity for high rates of fire and as a suppressor host. The Duty Series Big Gunner barrels are ideal for use in competition, law enforcement, and military applications.



  • 4150 GBQ (416R) Steel Construction
  • QPQ Nitride Finish
  • LR-308 Barrel Extension (DPMS Compatible)
  • 11-degree Target Crown
  • Particle Inspected
  • Button Rifled


Made In United States of America

WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov.


Product Information

Cartridge 8.6 Blackout
Color Black
Finish Nitride
Material 4150 Chrome Moly Vanadium Steel
Length 16 Inches
Weight 2.2 Pound
Twist 1:3
Threads M18x1.5
Barrel Contour Big Gunner
Chrome Lined No
Gas System Length Carbine
Gas Block Diameter 0.875 Inches
Country of Origin United States of America
Compatible With
AR-10, LR-308

Delivery Information

Shipping Weight 2.340 Pounds


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