FNH AR-15 Barrel, 18" OAL, Rifle Length. This is a factory FNH USA FN-15 barrel and will also fit any AR-15 or clone. This barrel is 18" long, is designed to fit the rifle length gas system, and is chambered for 5.56x45mm.

Features:

• Chrome lined chamber and bore help resist corrosion and provide heat erosion resistance that greatly improves barrel life, and reliability of chambering and extraction.
• Mil-spec Barrel Steel - FN15 barrels are hammer forged from proprietary Chrom Moly Venadium (CMV) steel. This is the same steel developed for their machine gun barrels, that are designed to handle the punishment of full-auto fire, and is now available to you in their AR-15 barrels
• Magnetic Particle
• 1/2 x 28" threaded muzzle
• M4-style feed ramp and barrel extension for consistent and reliable feeding
• Manganese Phosphate barrel finish
• 1:7 RH twist rate
• 5.56 NATO Chamber