Set of 6 USN 40 mm/56 Bofors twin mount ver.1/with Mk-51 director
Set of 6 USN 40 mm/56 Bofors twin mount ver.2/ with Mk-51 director
6 pcs USN 40 mm/56 Bofors quad mount ver. 1 / with Mk-51 director
6 pcs USN 40 mm/56 Bofors quad mount ver. 2 / with Mk-51 director
6 pcs USN 40 mm/56 Bofors quad mount ver. 3 / with Mk-51 director