What is the most badass gun from sci-fi movies?

Our friends over at SCI FI Wire have a rundown of the six most kick-ass guns from sci-fi movies. Hellboy's Big Baby features prominently, and the machine pistol from RoboCop is there, too. Funny how you typically have to be a some kind of superpowered demon or a cyborg to have one of these suckers. Personally, we always liked Megatron's fusion cannon (inset) — that's the one from the '80s TV series, not the live-action flick.

Do you have a favorite sci-fi gun? Hit us with it in the comments. And in case you think all of these are just flights of fancy, check out this real-world stun rifle and this terrifying portable nuclear cannon.

Via SCI FI Wire