Windham Weaponry UR16M4FTB762 Complete Upper Assembly 7.62x39mm 16" Blk The complete Upper Receiver Assembly includes a 16 inch M4 profile barrel in 7.62 X 39mm complete with handguards, a Mil Std 1913 railed front sight base/gas block with sling swivel, bayonet lug, a 7.62 x 39mm bolt and bolt carrier, and a 30 round 7.62 X 39mm magazine. The barrel is 4150 Chrome Moly Vanadium 11595E Steel, chrome lined in the bore and chamber, rifled 1 turn in 9.5 inches - right hand twist - with 4 lands and grooves. The muzzle is fitted with an A2 birdcage type flash hider (threaded 5/8 x 24).
Type: Complete Gas Impingement Caliber: 7.62x39mm Sights: None (Optic Ready) Barrel Length: 16" Barrel Material: 4150 Chrome Moly Vanadium Steel Twist: 1:9.5" Barrel Description: Chrome-Lined Barrel Finish: Black Hard Coat Anodized Barrel Length Range: 16.00" to 17.99"
