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Faxon Firearms Duty Series
California Proposition 65 Warning

This product can expose you to chemicals including lead, known to cause cancer and birth defects. For more info visit P65Warnings.ca.gov.

Faxon Firearms

Duty Series

$238.00
$219.00
Sale Price
Low Stock (4 left) California compliant

Faxon Firearms Duty Series, Big Gunner, 1:3 Twist Barrel, 8.6 Blackout, 12", Pistol-Length Gas System, Fits AR-10, Nitride Finish, Black 10A863P12NGQ

Key Details
Brand Faxon Firearms
Manufacturer Part Number 10A863P12NGQ
UPC 816341026377
SKU FX10A863P12NGQ
Current Stock 4 available
Quantity Updated Apr 26, 2026 11:30 AM
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Purchase Requirements
  • Final availability is confirmed at checkout.
In-Store Pickup Required: All firearm purchases must be picked up at our Beverly Hills location after background check completion.
Product Description

As with all Faxon Barrels, these 8.6 BLK barrels are machined from raw bar stock in their greater Cincinnati Facility. Faxon 8.6 BLK barrels are fully stress-relieved, air-gauge tested, Magnetic Particle Inspected, and 11-degree target crowned to ensure superior accuracy. Constructed of 4150 CMV, each barrel goes through a battery of tests at each operation until finished in Nitride and final inspected.

Features
  • Barrel Material: 4150 CMV
  • Rifling: Button
  • Barrel Caliber: 8.6 BLK
  • Barrel Twist: 1:3
  • Barrel Length: 12";Barrel Profile: Big Gunner"
  • Barrel Gas System: Pistol
  • Inside Finish: Salt Bath Nitride
  • Outside Finish: Salt Bath Nitride
  • Muzzle Thread: M18x1.5, tapered shoulder (adapter included)
  • Gas Block Diameter: .875";Gas Block Journal Length: 1.9""
  • Barrel Extension: Standard DPMS Gen 1 .308 Extension, Black Oxide
  • Weight: 2.0 lbs
  • Magnetic Particle Inspected
  • 11 degree Target Crown
Specifications
UPC: 816341026377
Manufacturer: Faxon Firearms
Manufacturer Part #: 10A863P12NGQ
Model: Duty Series
Model (Alt): Big Gunner
Barrel Length: 12"
Finish: Nitride
Type: Barrel