Death star...?
Ok, the fact that the Death Star made it to the list hints at a Star Wars happy survey sample...
How about the satellite laser cannon in Akira??
Judge Dred's Law-maker (?? or whatever it's called, admittedly rubbish film though).
The M56 smart gun from Aliens??
The personally signatured heat seeking bullet in Runaway (http://www.technovelgy.com/ct/content.asp?Bnum=1037)??
The lawn mower in Braindead??
I'm sure the list goes on and on more than any damn energiser bunny..
Also "Machine Gun - Scarface" - WTF?!?!? Surely they would of needed to actually pick one of the ones used, rather than generalise!!