http://www.bbguns.co.uk/1236_1_23136.html

Looks like some airsoft manufacturer made a gun based on a Shadowrun illustration. They already make lots of airsoft Robocop guns (Ares Predator), this might be another visual aid if you LARP shadowrun or something.

here's an illustration originally from the SR mainbook 2nd edition
http://www.ambient.ca/cpunk/shadowguns/handguns.html