Shop › NCSTAR AR15 BARREL NUT CROWS FT TOOL NCSTAR AR15 BARREL NUT CROWS FT TOOL $15.99 NcSTAR AR15 Crows Foot Barrel Tool, For Use on AR15 Barrel Nut, Steel Construction, Matte Finish, Black VTARCFBRL Add To Cart Added! NcSTAR AR15 Crows Foot Barrel Tool, For Use on AR15 Barrel Nut, Steel Construction, Matte Finish, Black VTARCFBRL