Product DescriptionThe FN AR-15 Cold Hammer Forged (CHF) barrel is built from FNs proprietary high-grade Chrome Moly Vanadium steel, the same barrel steel and forging process used for FN machine gun barrels designed to withstand extreme heat and sustained fire. Each barrel is Magnetic Particle tested to help ensure consistent quality and structural integrity. A chrome-lined bore and chamber improve corrosion resistance and reduce heat erosion for extended barrel life and reliable chambering/extraction. M4-style feed ramps and barrel extension support consistent feeding, while the matte black phosphate finish helps resist external corrosion and oxidation.Product Highlights Cold hammer forged AR-15 barrel made from high-grade Chrome Moly Vanadium steel Chrome-lined bore and chamber for corrosion resistance, reduced heat erosion, and longer service life Magnetic Particle tested for added quality assurance and consistency M4-style feed ramps and barrel extension designed for reliable feeding Matte black phosphate finish helps protect against corrosion and oxidationSpecs Brand: FN Platform: AR-15 Caliber: 5.56x45mm NATO Barrel Length: 14.70 in Barrel Profile: M4 profile Gas System Length: Carbine length Material: Chrome Moly Vanadium steel Manufacturing: Cold hammer forged Bore/Chamber: Chrome lined Feed Ramps: M4 style Testing: Magnetic Particle tested Finish: Matte black phosphate Manufacturer Part Number: 20100405 UPC: 845737011147Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the products manufacturer.