FN AR-15 5.56 NATO 16in Carbine-Length Hammer Forged Barrel

This FN AR-15 barrel is a 16-inch carbine-length gas system chambered for 5.56x45mm NATO. It is cold hammer forged from FN’s proprietary high-grade Chrome Moly Vanadium steel and undergoes Magnetic Particle inspection to confirm absence of micro-stresses. The bore and chamber receive chrome lining to resist corrosion and erosion, and the barrel features M4-style feed ramps and a Manganese Phosphate external finish. The specification set targets durability and consistent performance for duty, range, and general-purpose AR-15 builds.

Key Specifications

• The barrel is chambered for 5.56x45mm NATO.
• The barrel measures 16 inches and uses a carbine-length gas system.
• The manufacturing process is cold hammer forged from high-grade steel.
• The barrel material is Chrome Moly Vanadium steel.
• The bore and chamber are finished with a chrome lining for corrosion and heat resistance.
• The external finish is Manganese Phosphate in a matte black appearance.
• Feeding is supported by M4-style feed ramps and a standard AR-15 barrel extension.
• The barrel lists a weight of 2.1 (unit not specified in source data).
• The barrel type is specified as Carbine Length.

Reliable construction and service-oriented features make this FN 16-inch barrel a practical choice for AR-15 builders seeking a durable, chrome-lined cold hammer forged option in 5.56x45mm NATO. Its combination of materials and finish emphasizes longevity and consistent feeding for a range of field and range applications.