OOS: Sorry guys, just need to explain something. The whole negative armor charge is possible. You see, what is called a "laser" blast in Star Wars terminology is, quite simply, not. What we call a laser is actually charged Tibanna gas, which is why laser weapons have ammunition problems. There is a scalability issue with lasers, meaning that they take longer and longer to charge the larger they get. So, therefore, Tibanna gas is used, rather similar to an Ion cannon, in that they fire a positively charged stream of Ions. Just thought I'd clear that up.
"Space is big... really big. I mean, you wouldn't believe how vastly, hugely, incomprehensibly big it is. You may think it's a long way down the road to the chemist, but that's just peanuts to space." The Hitchiker's Guide to the Galaxy