FN AR-15 16″ 5.56 NATO Button Rifled Chrome-Lined Barrel

This FN AR-15 replacement barrel is built from Chrome Moly Vanadium material to military specification and is designed for use with 5.56x45mm NATO/.223 Remington. It features button rifling with a chrome-lined bore and chamber for improved corrosion resistance and longevity. The barrel uses a carbine-length gas system with M4-style feed ramps and a manganese phosphate (matte black) external finish.

Key Specifications

• The caliber is 5.56x45mm NATO / .223 Remington.
• The barrel length is 16 inches.
• The rifling method is button rifled.
• The bore and chamber are chrome lined.
• The gas system is carbine length.
• The barrel has M4-style feed ramps and barrel extension for consistent feeding.
• The external finish is matte black manganese phosphate.
• The muzzle is threaded.
• The barrel material is Chrome Moly Vanadium (per Mil-B-11595E).
• The barrel is High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) at the factory.

Purpose-built for shooters who value durable, serviceable components, this FN 16″ barrel delivers proven manufacturing standards and features that support reliable feeding, corrosion resistance, and extended barrel life in general shooting, duty, and field-use contexts. Its combination of chrome lining, button rifling and robust materials makes it a practical choice for those assembling or upgrading an AR-15 platform where longevity and dependable function are priorities.