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Faxon Firearms AR-15 5.56 NATO Gas Block Pencil Profile 16in Mid-Length Threaded Barrels 15A58M16NPQ-APGB Color: Black Nitride, Finish: Nitride, 17% Off, Blazin' Deal w/ Free Shipping

Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB
Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB
Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB
Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB
Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB
Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB
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Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB
Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB
2 of 5 images
Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB
Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB
3 of 5 images
Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB
Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB
4 of 5 images
Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB
Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB
5 of 5 images
Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB

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Questions & Answers
Will this fit my Colt ban era rifle? Manufacturer Answer

This barrel will fit all standard AR-15 pattern upper receivers. Depending on the model of rifle you are replacing the barrel on, you may also need a new gas tube and handguard/forend.

by Faxon Firearms, Manufacturer, February 19, 2026
View All Q&A You Have a Question? Ask!

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Color:
Black Nitride
Finish:
Nitride
Caliber:
5.56x45mm NATO
Barrel Length:
16 in
Barrel Profile:
Pencil
Gas System Length:
Mid Length
Gas Block Journal Size-Diameter:
.625 in
Barrel Twist Rate:
1-8
Barrel Material:
4150 Chrome Moly Vanadium
Flutes:
No
Gun Make:
AR Platform
Gun Model:
AR-15
Included Accessories:
None
Condition:
New
Gas Block Journal Size-Length:
1.1 in
Gun Type:
Rifle
Firearms Threads Per Inch:
1/2x28

Code: 11I-ATB-FF556PRBA2-15A58M16NPQ-APGB

MPN: 15A58M16NPQ-APGB

UPC: 816341025417

Blazin' Deal
List: $228.00Save 17%
$189.00

Product Info for Faxon Firearms AR-15 5.56 NATO Gas Block Pencil Profile 16in Mid-Length Threaded Barrels

Featherweight performance with a factory pre-pinned .625in gas block for unmatched reliability. The Faxon 16in 5.56 Pencil Barrel with Pinned Gas Block delivers lightweight handling and rock-solid performance. Each barrel is pre-notched and paired with a pre-drilled, low-profile gas block that's pinned and aligned in-house-saving you time and ensuring your gas system never shifts during use.image

Crafted from 4150 CMV steel and finished inside and out with black nitride, this Pencil contour barrel offers excellent corrosion resistance, accuracy, and balance. Every Faxon barrel is stress relieved, air-gauge tested, MPI-inspected, and headspace verified for dependable performance in every environment.

WARNING: California`s Proposition 65

Specifications for Faxon Firearms AR-15 5.56 NATO Gas Block Pencil Profile 16in Mid-Length Threaded Barrels:

Manufacturer: Faxon Firearms
Color: Black Nitride
Finish: Nitride
Fabric/Material: 4150 CMV
Caliber: 5.56x45mm NATO
Barrel Length: 16 in
Barrel Profile: Pencil
Gas System Length: Mid Length
Gas Block Journal Size-Diameter: .625 in
Barrel Twist Rate: 1-8
Barrel Material: 4150 Chrome Moly Vanadium
Flutes: No
Gun Make: AR Platform
Gun Model: AR-15
Included Accessories: None
Condition: New
Gas Block Journal Size-Length: 1.1 in
Gun Type: Rifle
Firearms Threads Per Inch: 1/2x28
Rifling Profile: Button Rifling

Features of Faxon Firearms AR-15 5.56 NATO Gas Block Pencil Profile 16in Mid-Length Threaded Barrels:

  • Factory-pinned .625in gas block: Pre-drilled and aligned for long-term stability under recoil.
  • Lightweight Pencil profile: Improves handling and reduces fatigue without sacrificing accuracy.
  • Mid-length gas system: Smooth, consistent cycling and reduced wear on internal parts.
  • Durable nitride finish: Corrosion-resistant inside and out for extended service life.
  • Stringent QC: Stress relieved, air-gauge tested, MPI-inspected, and headspace verified in-house at Faxon Firearms.

Package Contents:

  • Faxon Firearms AR-15 5.56 NATO Gas Block Pencil Profile 16in Mid-Length Threaded Barrels

What firearm models does the manufacturer say Faxon Firearms AR-15 5.56 NATO Gas Block Pencil Profile 16in Mid-Length Threaded Barrels is compatible with?

The manufacturer suggests that Faxon Firearms AR-15 5.56 NATO Gas Block Pencil Profile 16in Mid-Length Threaded Barrels is compatible with AR-15

Faxon Firearms AR-15 5.56 NATO Gas Block Pencil Profile 16in Mid-Length Threaded Barrels Orderable Models

List of Orderable Models

  • Faxon Firearms AR15 5.56 NATO, Threaded Barrel, 16in, Pencil Profile Mid-Length, 1-8 Twist, 1/2x28, Black, 15A58M16NPQ-APGB , MPN: 15A58M16NPQ-APGB , UPC: 816341025417 , Code: 11I-ATB-FF556PRBA2-15A58M16NPQ-APGB
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Last updated 2026-07-01 UTC.