FAXON DUTY SERIES GUNNER PROFILE 16" CARBINE-LENGTH 300 BLK AR15 BARREL

Faxon
SKU:
15A38C16NGQ
|
UPC:
816341023222
Availability:
Usually ships within 2 business days when available.
$173.00

Not sure if this is the right 300 Blackout barrel?
We built a complete guide covering barrel length, twist rate (1:5 vs 1:8), suppressed performance, and series differences.

Read the 300 Blackout Barrel Buyer’s Guide →

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Description

Faxon Duty Series — 16" Gunner 300 BLK AR-15 Barrel (Carbine-Length Gas)

4150 CMV • Button Rifled • Gunner Profile • Nitride Inside & Out • MPI & Headspace Checked

The Faxon Duty Series 16" Gunner 300 BLK is the ideal balance of strength, weight, and performance. The Gunner profile combines the durability of a government contour with the agility of a pencil barrel—keeping the rifle balanced and responsive for any application.

Machined from 4150 CMV steel, button rifled with a 1:8 twist, and treated with salt bath nitride inside and out for corrosion resistance and long service life. Every Faxon barrel is stress relieved, air-gauge tested, MPI inspected, and headspace verified for unmatched quality control.

Key Benefits

  • Gunner Profile: Combines Gov’t strength with Pencil-like handling for ideal balance.
  • Carbine-Length Gas: Tuned for reliable cycling in 300 BLK platforms.
  • 4150 CMV Steel: Mil-spec-grade strength and excellent heat resistance.
  • Nitride Inside & Out: Improved barrel life, corrosion resistance, and easier cleaning.
  • Precision QC: Stress relieved, MPI tested, and headspace checked in-house.

Specifications

Caliber / Chamber
300 Blackout (300 BLK)
Length
16"
Profile
Gunner
Gas System
Carbine-Length
Material
4150 CMV
Rifling Method
Button-Rifled; 1:8 Twist
Finish
Salt Bath Nitride (inside & out)
Muzzle Threads
5/8x24
Gas Block Diameter
.750"
Gas Block Journal Length
1.9"
Barrel Extension
M4
Weight
1.48 lbs
Crown
11° Target Crown

Frequently Asked Questions

Will this barrel work with both subsonic and supersonic ammo?
Yes — the 16" Gunner 300 BLK performs well with both load types. Carbine gas offers reliable cycling for most factory ammunition.
What muzzle devices fit this barrel?
Standard 5/8x24 threaded .30-caliber devices—brakes, flash hiders, and most 300 BLK suppressor mounts.
Why choose the Gunner profile?
The Gunner combines the rigidity of a government contour with the lighter front of a pencil barrel, improving balance and handling.

Overview: 16" Duty Series Gunner 300 Blackout Barrel

The Faxon Duty Series 16" Gunner 300 BLK offers a perfect blend of accuracy, durability, and light handling. Built from 4150 CMV and treated with nitride inside and out, this barrel is engineered to perform across subsonic, supersonic, suppressed, and unsuppressed configurations.

Featuring a Gunner profile, 1:8 twist, carbine-length gas system, and 5/8x24 muzzle threads, it’s optimized for modern 300 Blackout builds. Each Faxon barrel is stress relieved, air-gauge tested, MPI inspected, and individually headspace verified to deliver the reliability and precision shooters expect from Faxon Firearms.

Warranty Faxon Lifetime Guarantee. Covers manufacturing and material defects to the original purchaser. Excludes damage from misuse, neglect, non-standard ammunition, or modifications. Register your product at faxonfirearms.com/product-registration to expedite service. For purchases through dealers or distributors, warranty repairs are handled directly by Faxon Firearms; refunds must be processed through the selling entity. Full policy: faxonfirearms.com/warranty-privacy-terms/