Faxon 16 inch 5.56 Gunner profile barrel with factory pinned .625 gas block

FAXON PINNED GAS BLOCK GUNNER PROFILE 16" MID-LENGTH 5.56 NATO AR15 BARREL

Faxon
SKU:
15A58M16NGQ-APGB
|
UPC:
816341025400
Availability:
Usually ships within 2 business days when available.
$227.00
(11 reviews)
Current Stock:
Description

Faxon Pinned Gas Block — 16" Gunner Profile 5.56 NATO AR-15 Barrel (Mid-Length Gas)

Lightweight Gunner contour with a factory pre-pinned .625" gas block for rock-solid reliability.

The Faxon 16" 5.56 Gunner Barrel with Pinned Gas Block eliminates the hassle of pinning your gas block. Faxon pre-notches the journal, pre-drills the low-profile gas block, and includes the retaining pin—ensuring your gas system won’t loosen or shift under recoil.

The Gunner profile blends the durability of the Gov’t contour with the weight savings of the Pencil profile for perfect balance and fast handling. Constructed from 4150 CMV steel with a QPQ nitride finish inside & out, it’s button-rifled 1:8 twist for excellent all-around accuracy and longevity.

Key Benefits

  • Factory-pinned .625" gas block: Pre-aligned and drilled for secure, maintenance-free installation.
  • Balanced Gunner profile: Combines Gov’t strength with Pencil weight for improved maneuverability.
  • Mid-length gas system: Smooth recoil impulse and consistent cycling with 5.56 NATO loads.
  • Durable QPQ nitride finish: Superior corrosion and wear resistance for hard-use reliability.
  • Comprehensive QC: Stress relieved, air-gauge tested, MPI-inspected, and headspace verified in-house.

Specifications

Caliber
5.56 NATO
Length
16"
Profile
Gunner
Gas System
Mid-Length
Material
4150 CMV Steel
Rifling
Button-Rifled, 1:8 Twist
Finish
Salt Bath Nitride (inside & out)
Muzzle Thread
1/2x28
Gas Block Diameter
.625" (factory pre-pinned)
Gas Block Journal Length
1.9"
Barrel Extension
M4
Weight
1.37 lb (approx.)
Crown
11° Target Crown

Included: Barrel, low-profile gas block (hand-tightened for shipping), and retaining pin.

Frequently Asked Questions

Is the gas block already pinned?
Yes. The journal is notched, and the gas block is pre-drilled and aligned; the pin is included (hand-tightened for transit).
What makes the Gunner profile unique?
It combines the strength of the Gov’t profile with the weight savings of a Pencil contour, improving handling without sacrificing accuracy.
What muzzle devices fit?
Compatible with all standard 1/2x28 muzzle devices and suppressor adapters for 5.56 / .223.

Overview: 16" Pinned Gas Block Gunner 5.56 Barrel

The Faxon Pinned Gas Block 16" Gunner 5.56 Barrel blends reliability, performance, and weight savings for the ideal all-around AR-15 build. The factory-pinned .625" gas block locks your gas system securely in place, while the mid-length gas system provides smooth operation and reduced recoil. Each barrel is stress relieved, air-gauge tested, magnetic particle inspected, and headspace verified for proven Faxon quality.

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/