A Windham Classic, this barrel assembly measures 16” in length and turned in the M4 profile. The assembly comes complete with the Barrel Extension, WW Free Float Handguard Barrel Nut, an installed Low-Profile Gas block and Gas Tube, and A2 Birdcage Flash Hider. The muzzle is threaded 1/2″ x 28 T.P.I. and is finished with an 11-degree target crown to enhance accuracy. Machined from 4150 Chrome Moly Vanadium 11595E Steel, this quality barrel is Chrome Lined in both the Bore and Chamber for prolonged wear resistance and ease of cleaning. Additionally, the Black Manganese finish on this assembly offers protection against rust and corrosion. Rifling is 1 turn in 9 inches – right hand twist for optimum accuracy with a wide range of .223 / 5.56mm ammunition. All top-quality Windham Weaponry parts – made in the USA.