So here is your main character, Mr. Gun, in all his rendered glory.

Here's how messy some parts look in wireframe, from boolean-ing out the barrel

To animate the slide I parented everything to an empty that can be slid back and forth

First time making a gun in blender and there are plenty of ways I could have made this nicer in the future. Anyway, don't forget to check out our game and see the rest of my modeling! https://ldjam.com/events/ludum-dare/48/the-depths-of-science