First off, I know I know. "we don't need any more guns". But this is a little different.
Brickarms.com is a place where they sell unofficial Legos, that they make. Mainly weapons. If you go to
http://www.brickarms.com/toys/weapons.aspx you will see the variety of weapons they sell. After seeing this, I thought they would be a nice base for someone to make new weapons here, with extremely basic models and scripts. They fit real well with the "blocko" style, because hell, they're Legos.
They would make a great, simple pack for people who just want a pack of weapons that fit together, without all the fancy scripting of some other packs. Some of the weapons are Halo inspired, some are Fallout inspired, some are regular modern weapons, some are WW2 weapons, some WW1 weapons, and one of them is even from Bladerunner. I'll go ahead and compile a set of pictures from the site incase people don't wanna click links.

There's a ton more, but I don't wanna post a ton of them when they're all on the website. It would be ideal just to have the model, and have them shoot, and nothing more than that. No hand animations, reloading, or any of that stuff. The only exception would be bolt action or pump action weapons.