Algodoo

I squeezed all the components of a gun into a spaller package that still fires a subtantial payload. You can cut the barrel if you like.

W/S - Elevate/Depress Gun
F - Shoot

How to load:
Drag a shell by the grey part into the breech. The loading door should slide down smoothly, but make sure it pops back up before firing.

How to unload:
After you've shot, drag the loading door down all the way. The spent shell should automatically slide back out.

Might use this on a tank later.