Algodoo

up and down to aim.
hold X to fire.
use the drag tool (slowly so the shells dont break) to manually reload <no automatic reload>

well here`s a german 88 gun from ww2. its not meant to be a complete lookalike, it barely resembles one. but otherwise it works fair. copy the shells to gain new ones (obviously)
it the shells havee an explode effect that sometimes trigger when they hit the ground. there are at some angles that the gun wont fire as well as on some others.

feel free to use it in any scene BUT GIVE ME THE CREDIT