FN AR-15 16in Button Rifled Barrel .223/5.56 NATO, Chrome-Lined

This FN America 16 inch AR-15 barrel is a factory-quality component intended for carbine-length builds and general-purpose shooting. It is button rifled from U.S.-sourced Chrome Moly Vanadium material and finished in matte black manganese phosphate. The bore and chamber are chrome lined and each barrel is High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) to ensure dimensional and material integrity. The barrel uses an M4 profile with M4-style feed ramps and includes a 1/2×28 threaded muzzle and a 1:7 RH twist rate.

Key Specifications

• The barrel is chambered for .223 Rem / 5.56x45mm NATO.
• The barrel measures 16 inches and is a carbine-length profile.
• The barrel employs a button-rifled bore manufactured from Chrome Moly Vanadium material.
• The bore and chamber are chrome lined for corrosion resistance and improved durability.
• The exterior finish is manganese phosphate (matte black).
• The barrel has an M4-style feed ramp and M4 profile extension for consistent feeding.
• The barrel uses a carbine-length gas system.
• The muzzle is threaded 1/2×28 for common muzzle devices.
• The rifling twist rate is 1:7 RH to stabilize a wide range of bullet weights.
• Each barrel is subjected to HPT and MPI inspection protocols at the factory.

Built to mil-spec standards and finished for long service life, this FN AR-15 16″ barrel offers a combination of reliability, corrosion-resistant features, and consistent feeding for carbine-style platforms. Its chrome-lined bore and chamber, inspected manufacturing process, and widely compatible specifications make it a practical choice for builders and shooters seeking a durable factory barrel for training, range use, or duty-style carbine applications.