Algodoo

this is a recoiless gun / rocket launcher
i have 5 dummy rockets and 1 experimental explosive warhead (left)
it works exactly as you expect, stuff them down the barrel
cock the hammer marked green and press enter to fire
they are a little stiff to press into place but thats part of how it functions
be careful when inserting the explosive warhead as it slamming back will set it off
there's also a target off too the right.