FN AR15 premium button rifled barrels are manufactured using U.S. sourced Chrome Moly Venadium material per Mil-B-11595E. Each barrel is High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) to ensure that it is free of micro-stresses or flaws, resulting in consistency and quality in every barrel shipped from the factory. The bore and chamber are chrome lined to help resist corrosion and provide resistance to heat erosion which greatly improves barrel life and reliable chambering / extraction. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. Currently available in a chambering of 5.56 x 45mm in the following profiles and gas system lengths 10.5" Government Carbine, 14.7" Government Midlength, 14.7" M4 Carbine, 16" M4 Carbine, 16" Government Carbine, 16" Government Midlength, 18" Government Rifle, 20" Government Rifle.

Features :

• 556 NATO
• Rifle Length Gas
• MPI and HPT
• Chrome Lined
• "18" SELLCOPY;FN20-100043;"FN AR15 premium button rifled barrels are manufactured using U.S. sourced Chrome Moly Venadium material per Mil-B-11595E. Each barrel is High Pressure Tested (HPT) and Magnetic Particle Inspected (MPI) to ensure that it is free of microstresses or flaws, resulting in consistency and quality in every barrel shipped from the factory."

� "Color: Black
� Restricted State1: CA
� Type: Barrel
� Caliber: 556NATO
� Fit: AR Rifles
� Description: Rifle Length Gas System
� Subcategory: Rifle Barrels
� Barrel Length: 18\, "Type of Barrel: Button-Rifled
� Manufacturer Part #: 20-100042"

*Item must be returned in unused condition and in the original manufacturer's packaging (if applicable). If an item arrives non-defective and accurate to its description, this guarantee does not apply and returns will not be organized in those situations. Please confirm compatibility and specifications with us regarding item FN BBL M16 BB 18" RIFLE LENGTH 556 before purchasing if you are unsure.