Algodoo

this uses gas that is pressurised to fire a gun, but because it starts braking when you compress it alot i have added bounciness things in the middle of the "gas " balls , it comes in a gas magazine that is releasable. press enter to release the gas, then make sure all of the cylinder and pistol fills up up to the red trigger on the upper level, then use the drag tool and grab the barrel and pull it up and it will rise at an angle until the little bar in the piston locks into the little thing. now it stays sometimes, others it fires back out again so fixate it if you wish, now raise the barrel again and put a pellet from the left side in the end of it , make sure it doesnt go to far in. then simply pull the trigger. this will release the gas and push the piston head back again, it would be re fireable but there is gas that gets behind the piston and there isnt enough gas. sorry lol
rate and comment please XD