Weapons would be an individual thing. Those oweing favors to the USA purchased Sea Sparrow. Those wanting to actually shoot something down could use Italian Aspide or German Skyflash missiles. Pretty much everyone - having no marines - felt that a 3 inch Dutch Oto-Melara gun was sufficient. The Spanish and Germans took American Harpoons while the Dutch and others used Exocet and or Sea Eagle.
The builder's intention was that the design could be modified on the fly to provide a larger ship. No one needed it as the Cold War ended. Last-ditch defense was provided by either American Phalaynx, Dutch Goalkeeper or Spanish Meroka. Lately, all have gone to American RAM.