A new take on 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. 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 9.5 inches – right hand twist – with 4 lands & grooves for optimum accuracy with a wide range of 7.62 X 39mm ammunition. The muzzle is threaded 5/8″ x 24 T.P.I. to accept a variety of flash hiders or muzzle brakes. This assembly also includes a 30rd magazine, complete 7.62×39 bolt and an enhanced firing pin specific to this caliber. All top-quality Windham Weaponry parts – made in the USA.