Shop › NCSTAR AR15 CASTLE NUT CROWS FT TOOL NCSTAR AR15 CASTLE NUT CROWS FT TOOL $15.99 NcSTAR AR15 Crows Foot Lower Tool, For Use on AR15 Castle Nut, Steel Construction, Matte Finish, Black VTARCFLWR Quantity: Add To Cart Added! NcSTAR AR15 Crows Foot Lower Tool, For Use on AR15 Castle Nut, Steel Construction, Matte Finish, Black VTARCFLWR