Why let Arnold have all the fun? Here is the railgun I made out of some junk I had lying around my room. Oh yeah, for security reasons I am not allowed to show you the design process of this mod.
 

Here is the original railgun Arnie uses in Eraser. Observe its crappy design.

I was able to make HUGE improvements to the design, and have created the most advanced piece of weaponry in the universe!

Observe! Pinpoint accuracy from miles away!

Uhh.. wait a minute... that had nothing to do with computer hardware...