DoubleStar 16in 1x9 DS-4 Gov't Barrel with Forged Sight Base Black AR561. 9 twist. w/Forged sight base Features of Doublestar 16in 1x9 DS-4 Gov't Barrel with Forged Sight Base BBL: DS4 16" Gov't Barrel Twist: 1.9 Sight Base: Forged Package Contents:...