LR-308 (AR-Stoner) Barrel 20" 416R Stainless Steel .308 Winchester Medium Contour (3Lb's)1 in 10" Twist. 5/8"-24 threaded. AR-10/M4 Feed Ramps . Rifle length gas tube.Barrel is dimpled for gas block (0.75 Inch}.US made. Lightly Used 100 rounds or less with good ammo, No steal case or corrosive, $100.00 cash.