Fn Bbl Ar15 Hf 16" Midlength 556nato

The FN BBL AR-15 16\" Midlength Barrel in 5.56 NATO gives you access to the same cold hammer forging and quality control that FN has refined over more than a century of barrel manufacturing. This midlength gas system strikes a practical balance for modern AR builds—offering softer recoil impulse and faster handling than rifle-length systems while maintaining reliable function across a wide range of ammunition. Whether you're building a precision rifle, a dependable patrol carbine, or a versatile general-purpose setup, this barrel delivers the accuracy and durability FN is known for.

Like FN's machine gun barrels designed to endure fully-automatic fire, this AR-15 barrel is forged from high-grade Chrome Moly Vanadium steel and subjected to Magnetic Particle testing at the factory to catch micro-stresses or metallurgical flaws before they reach your rifle. The result is consistency you can count on shot after shot. A chrome-lined bore and chamber resist corrosion and heat erosion, extending barrel life and ensuring reliable extraction even after thousands of rounds. The M4 style feed ramps and barrel extension provide the feeding reliability modern tactical and hunting rifles demand.

The matte black Manganese Phosphate finish protects against external corrosion and oxidation, blending durability with a classic, no-nonsense aesthetic. At .750\" diameter at the gas block, this barrel is compatible with standard AR-15 gas blocks and fits seamlessly into any AR platform build. FN's "Distinct Advantage" engineering means you get a precision component built to exacting standards—not a mass-produced compromiser.

Key Features

• Cold hammer forged from Chrome Moly Vanadium steel for strength and durability
• Magnetic Particle tested at the factory for internal consistency and flaw detection
• Chrome-lined bore and chamber resist corrosion and heat erosion
• M4 style feed ramps and barrel extension for reliable feeding
• Matte black Manganese Phosphate finish resists external corrosion
• Midlength gas system for balanced recoil and handling
• Standard .750\" diameter at gas block

Specifications

Frequently Asked Questions

What gas system length is this barrel, and how does it compare to carbine and rifle lengths?

This is a midlength gas system barrel. Midlength systems are generally softer shooting than carbine-length and offer faster target reacquisition, while providing better reliability and less bolt carrier wear than many shorter designs. The 16\" barrel length makes it suitable for hunting, competition, home defense, and general-purpose shooting.

Will this barrel work with my AR-15 build?

Yes, this barrel is built to AR-15/M16 specifications and features the standard .750\" diameter at the gas block, making it compatible with any standard AR-15 platform and typical gas blocks.

What ammunition does this barrel accept?

The barrel is chambered in 5.56 NATO and will also safely fire .223 Remington ammunition.

Why does FN use chrome lining in the bore and chamber?

Chrome lining significantly resists corrosion and heat erosion, which extends the barrel's service life and ensures consistent, reliable chambering and extraction through thousands of rounds—especially important for rifles that see regular use or harsher environments.