Some idea generation for weird weapons from these Cracked article http://www.cracked.com/article_19702_7-awesomely-insane-guns-people-actually-used.html and the followup http://www.cracked.com/article_21802_6-awesomely-insane-guns-people-actually-used-pt.-2.html
http://www.cracked.com/article_19702_7-awesomely-insane-guns-people-actually-used.html