Faxon Firearms 15A57C16N4P-Cl Duty 223 16 Carbine

The Faxon Firearms Duty 223 16 Carbine barrel is a purpose-built replacement barrel for AR-15 platforms chambered in .223 Remington. Whether you're building a compact carbine, refreshing an existing rifle, or setting up a dedicated training or duty gun, this 16-inch barrel delivers the balance of velocity and handling that made the 16-inch carbine a standard in professional and civilian applications. Faxon barrels are known for tight tolerances and consistent accuracy, and the Duty Series focuses on reliability and durability in real-world use.

Built from 4150 Chrome Moly Vanadium steel and finished with Black Nitride—a hardened, corrosion-resistant coating—this barrel is ready for both suppressed and unsuppressed shooting. The Duty profile is designed for shooters who need a barrel that handles well and performs reliably without unnecessary weight. At 16 inches, you'll get respectable velocity for .223 loads while maintaining a compact platform that's quick in tight spaces and doesn't fatigue the shooter during extended training or patrol cycles.

Drop this barrel into your AR-15 build or swap it into an existing upper receiver (assuming proper headspace verification during assembly). The .223 Remington chambering covers a wide range of factory ammunition, making it practical for training, hunting small to medium game, and general-purpose shooting. The Black Nitride finish is effective against corrosion and requires no special maintenance—standard rifle care will keep it running.

Key Features

• 16-inch carbine length for balanced handling and velocity
• 4150 Chrome Moly Vanadium steel construction
• Black Nitride finish for corrosion resistance and durability
• .223 Remington chambering—versatile, affordable, widely available ammunition
• Duty Series profile engineered for reliability and real-world use

Specifications

Frequently Asked Questions

Will this barrel fit my AR-15 upper receiver?

Yes, this is a standard AR-15 barrel. Installation requires removal of the barrel nut and proper headspace verification during assembly. If you're building from scratch or swapping barrels, ensure proper tools and knowledge are in place—or have a gunsmith handle the work.

What ammunition does the .223 Remington chambering shoot?

.223 Remington is one of the most common rifle cartridges in the United States. It covers factory loads from major manufacturers in a wide range of weights and purposes, from 55-grain training rounds to heavier loads for hunting and long-range shooting.

Is this barrel suitable for suppressed shooting?

Yes. The Black Nitride finish holds up well to the higher pressures and temperatures associated with suppressed fire, and the 16-inch length pairs effectively with modern suppressors for a manageable overall package.

What is Black Nitride finish and why does it matter?

Black Nitride is a hardening process that creates a thin, ultra-hard layer on the steel surface. It resists corrosion better than standard bluing or parkerizing, requires minimal maintenance, and provides a professional appearance. It's commonly used on duty and professional-grade barrels for its durability and low-maintenance properties.