The Faxon Firearms Duty Series Gunner Barrel in .300 Blackout is a lightweight, high-performance barrel designed for AR-15 pistol or short-barrel rifle (SBR) builds. Featuring a 10.5-inch button-rifled profile, pistol-length gas system, and nitride finish, this barrel balances fast-handling characteristics with enhanced heat dissipation and durability. Optimized for suppressed or unsuppressed configurations, it offers exceptional reliability and precision.
Easier approval. $0 Down. Easy installments up to 36 months. Approvals up to $5,000. No hard credit inquires for Pre-Approval. Apply and Buy Today!
Shoot Now, Pay Later® 4 Pay
Pay in 4. Four Payments, no interest for purchases between $150 to $985. No hard credit inquires for Pre-Approval. Apply and Buy Today!
Shoot Now, Pay Later® 4 Pay and Traditional Financing
Try Pay in 4 at 0% interest for purchases between $150 to $985. Or Select Easy installments up to 36 months. Approvals up to $5,000. No hard credit inquires for Pre-Approval. Apply and Buy Today!
Constructed from 4150 CMV steel and treated with a corrosion-resistant nitride finish, the Gunner barrel is engineered for longevity and consistent performance. Its Gunner profile blends pencil-light front-end handling with a government-profile chamber section, giving shooters a responsive and durable setup. The 1:8 twist rate is ideal for stabilizing a wide range of .300 BLK projectiles, including subsonic loads.
The 11-degree target crown enhances accuracy, while the .750-inch gas block diameter and M4 barrel extension ensure compatibility with standard AR-15 components. This barrel is magnetic particle inspected (MPI) for quality assurance and features 5/8x24 muzzle threading to accommodate a wide array of muzzle devices or suppressors.
Faxon Duty Series Gunner Barrel Specifications
Manufacturer: Faxon Firearms
Series: Duty Series
Caliber: .300 Blackout
Barrel Length: 10.5 inches
Gas System: Pistol Length
Barrel Material: 4150 CMV Steel
Barrel Type: Button Rifled
Barrel Profile: Gunner
Barrel Twist: 1:8
Muzzle Thread: 5/8x24
Gas Block Diameter: .750 inches
Gas Block Journal Length: 1.9 inches
Barrel Extension: M4
Inside Finish: Nitride
Outside Finish: Nitride
Weight: 1.10 lbs
Crown: 11-Degree Target Crown
Quality Assurance: Magnetic Particle Inspected (MPI)
More Information
Condition
New in Box
Finish Per Color
Black
Manufacturer
Faxon Firearms
Manufacturer Part Number
15A38P10NGQ
Model
Gunner Barrel
Type
Rifle Barrels
UPC
816341023215
WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to WWW.P65WARNINGS.CA.GOV
Questions And Answers
Reviews
Due to increased state legislation around firearms, you must be 18 to access our site.
