From Source: Topless Robot
In real life, guns are cool if you're a private detective or a sporting marksmen. But most of the time kids are always shooting themselves or trying to hold up liquor stores or something, and that sucks. In the movies, however, guns are awesome. In science fiction movies, they're even more awesome and make for some amazing prop replicas. Anything goes in the realm of sci-fi firearms and many pieces completely ignore the laws that govern actual projectile-firing weapons. Early examples of the fictional guns are the heat-ray featured in H.G. Wells' War of the Worlds (1898) and several weapons from A.E. von Vogt's short The Weapon Shop (1942), which featured "express rifles" made of "viridescent magnesitic beryllium." Now in 2010, the futuristic weapons we see on screen are probably above and beyond what Wells imagined and as CGI advances, so does the destruction. So wave your rayguns in the air as we look at the cream of the fictional firearms cache.
Not so into guns, but damn these are cool.