Debuted
in 1988 with the Classic 50 (Originally Called the "Power Drencher"), The
Classic Set, released later in 1991, was the first to terrorize neighborhoods
with advanced water warfare.
Though in their time they were quite powerful and very abundant, these days an old classic water weapon will not just leave anyone out powered, but the old weapons probably don't work as well as they did before. Meaning you might be better off using a cheap plastic gun you can pick up in the Dollar Store.
The only use for Classic weapons these days really are just Collectors items and Last resorts.