That's right, it's a zambonitrebuchet monster truck.
You never even knew they existed. Well, they didn't until now.
And now you realize that you cannot live without one.
Aaaand just for fun, here's a video of me trying to get it to actually throw the zambonis. It does work with a little manual pressure (since there's no way the counterweight could lift that solid chunk of plastic off the ground). I hit myself in the head with the ammo a couple times. (Embedded as well for convenience.)
As always, a special thanks to my team for the advice, ideas and support! I probably wouldn't have had such a bizarre idea had not the collaborative hivemind of Jigsaw so inspired me!
At first I thought you had made Bad to the Bone from punkin chunkin: that thing is SCARY in person. Anyway, great job! (and if you haven't heard of bad to the bone or punkin chunkin, look it up :D it fits your moc perfectly!)