[RegulatorCountry]

You’d get thrown head over heels if you tried to fire the thing while in motion. Your forward momentum would continue while the Vespa would likely go backwards for a bit, lol.

[corkoman]

That is a recoilless weapon - just dont be the one pushing the Vespa while firing.

[Pontiac]

The 150 TAP's mounted M20 75 mm recoilless rifle, a U.S.-made light anti-armour cannon, was very light in comparison to a standard 75 mm cannon but was still able to penetrate 100 mm of armour by HEAT warhead. The recoil is counteracted by venting propellant gases out the rear of the weapon which eliminated the need for a mechanical recoil system or heavy mounts, enabling the weapon to be fired from the Vespa frame.

Vespa 150 TAP