I tried duckduckgoing it for quite a bit and failed. Does anybody have an idea?
From the forum in my comment below.
Yup, they used it, only for paratroopers but they had some.
That vespa and that cannon do not look survivable if para-dropped. Also an artillery cannon with no-recoil ? How would that even work on a Two-wheeler like a scooter ? Im pretty sure you would have to dismount and re-assemble the cannon on solid ground.
It’s probably a recoilless rifle, doesn’t need to be anchored like a normal cannon.
Despite the name, it is rare for the forces to completely balance, and real-world recoilless rifles do recoil noticeably (with varying degrees of severity).
A Vespa cannot take that kind of forces and survive.