Shop › AERO SOLUS BARREL NUT WRENCH AERO SOLUS BARREL NUT WRENCH $31.99 Aero Precision SOLUS Barrel Nut Wrench, Compatible with the Aero SOLUS Barrel Nut, 4140 Steel, Nitride Finish, Black APRH103073C Add To Cart Added! Aero Precision SOLUS Barrel Nut Wrench, Compatible with the Aero SOLUS Barrel Nut, 4140 Steel, Nitride Finish, Black APRH103073C