The Guntec USA BAR-16-TIN 16" 5.56mm Barrel delivers exceptional performance for shooting enthusiasts. Made from high-quality 4150 chromoly steel, this barrel ensures durability and precision with every shot. Its gold titanium nitride coating not only enhances aesthetics but also improves longevity and lubrication. 4150 Chromoly Steel 5.56/.223 Chambered in 5.56x45 1:7 Twist 1/2 by 28 Thread M4 Contour Profile Markings Spiral Engraved Near Break .750 Gas Platform System Tin Coating (Gold Titanium Nitride Finish) Aesthetic Coating Which Improves Durability & Lubricity M4 Feed Ramps Carbine Length Gas System Enhance your firearm's capabilities with the reliability of the Guntec USA BAR-16-TIN barrel.