I got to thinking about this, and I had a few minutes to burn, so I threw this together real quick. It's nothing big, just a single rebuilt tag, a few dependancy swaps and a bitmap internalized. What's the result?

The pistol now shoots a bright blue burst of energy, killing anything it touches and sending it flying back a wee bit. All the other guns on the map have been removed, all the powerups have been as well.
The pistol is deadly accurate, shoots at a much lower ROF so you can't just use the good ol' Spray-N'-Pray tactics. If you're up against a better player, you'll more likely then not lose, just as it should be. It never needs to be reloaded.
I know this is an easy mod, but by no means am I an inexpierienced modder, don't fall to the assumption that I'm new here by any means. I'm not asking for criticism because I know it's simple, it's something I threw together in literally 10 minutes.
Have fun kids:
CallMeSheF's Lazer Tag