Faxon Duty Series Pencil Profile — 16" Mid-Length 5.56 NATO (1:8 Twist)

Ultralight, balanced, and accurate — Faxon’s Pencil barrel optimized for all-day handling.

The Faxon Duty Series 16" Pencil Profile 5.56 NATO barrel is engineered for shooters who demand superior accuracy with minimal weight. Featuring Faxon’s signature Pencil contour, this barrel enhances agility and balance while maintaining precision and reliability. Ideal for lightweight builds, patrol rifles, and training carbines where speed and endurance matter.

Key Benefits

Lightweight performance: The Pencil profile minimizes forward weight while retaining accuracy and heat control.
Mid-length gas system: Smooth cycling, reduced recoil, and enhanced reliability for all shooting conditions.
High-quality steel: Machined from 4150 CMV Mil-Spec steel, stress relieved, and air-gauge tested for precision.
Corrosion-resistant finish: Black nitride inside and out for superior wear and easy maintenance.
Lightweight yet strong: Weighs only 1.20 lbs — ideal for long sessions or fast-moving courses.
Precision guaranteed: Each barrel is MPI-inspected and headspace checked for flawless performance.

Specifications

Caliber

5.56 NATO

Length

16" (Mid-Length Gas)

Profile

Pencil (Lightweight)

Material

4150 CMV Steel

Rifling

Button-rifled, 1:8 twist

Finish

Black Nitride (inside & out)

Gas System

Mid-Length

Gas Block Diameter

.625"

Gas Block Journal Length

1.1"

Muzzle Thread

1/2-28 TPI

Barrel Extension

Weight

1.20 lb (approx.)

Crown

11° Target Crown

Why Choose the Pencil Profile

The Pencil profile offers maximum weight savings and maneuverability without sacrificing performance. It’s perfect for shooters who want an agile rifle for dynamic movement, field use, or long range days without fatigue. Despite its light weight, Faxon’s stress-relieved 4150 CMV steel and black nitride finish ensure durability and consistent accuracy.

Installation & Compatibility

Standard M4 barrel extension fits all AR-15 upper receivers.
Accepts .625" gas block on 1.1" journal; adjustable recommended for suppressed setups.
1/2-28 threads fit brakes, comps, and suppressor adapters.
Compatible with mid-length gas tubes and standard AR-15 BCGs.

Frequently Asked Questions

Is this barrel good for a lightweight build?

Yes — the Faxon Pencil barrel minimizes forward weight, improving balance and control for lightweight rifles.

Is this barrel chrome-lined?

No — Faxon uses a black nitride treatment for smoother cleaning and superior corrosion resistance.

Can I use a suppressor with this barrel?

Yes — the mid-length gas system provides smooth cycling, especially with an adjustable gas block.

What bullet weights perform best?

The 1:8 twist stabilizes 55–77 grain bullets for reliable performance across various loads.

Overview: Lightweight 16" Mid-Length Pencil Barrel

The Faxon Duty Series 16" Pencil Profile 5.56 NATO barrel brings Faxon’s precision manufacturing and durability to a lightweight, agile design. With its mid-length gas system, this barrel delivers smooth recoil and consistent cycling for a wide range of AR-15 platforms.

Each barrel is made from 4150 CMV steel, button-rifled, stress relieved, air-gauge tested, and magnetic particle inspected. The black nitride finish protects inside and out, and the 11° target crown ensures consistent shot placement. Lightweight doesn’t mean fragile — this Pencil barrel is built for serious performance.

FAXON DUTY SERIES PENCIL PROFILE 16" MID-LENGTH 5.56 NATO AR15 BARREL

Write a Review

Faxon