Here is an original Mattel Agent Zero Sonic Blaster from the 1960's, very rare to find this side of the pond (I picked three up in person from the US and brought them back to blighty).

Used as the basis for the Batzooka as seen in the Adam West Batman movie and TV show, as well as Mr Freeze's ice ray (screen grabs included for reference).

This is a non-functioning example, (which is probably not a bad thing as they are surprisingly dangerous when used improperly) with scratches, dinks and repairs as pictured; this is #2 of 3 I'm listing.

Collection can be arranged from Kent.