I didn't have any idea about it before,except in the Russian film "1612"(see the screenshot below),the weapon in the movie is smaller than above,also handle by one man.
As far as I know from the plate and the film,this weapon rather resembles to a early European handgun,for it has a long stock,which allows easy aims during fighting in fortifications;it has matchlock firing system,and fires small grenades.
But I strongly want to know more,eg:What's the exact name of this weapon?just the "trench mortar"as Osprey indicates? Was this weapon also used in western Europe? Was it effective?
Just If you guys have more informations about it ,here's my gratitude.
Marc



