Leonardo da Vinci's Spingarde

Here are some images of Academy's Leonardo da Vinci's Spingarde.
These are simple kits but they're fun.

From the instructions"
The Leonardo da Vinci Spingarde launcher was placed on a firm wooden structure and could launch projectiles at targets over a wide range, due to its ability to move in all directions. Although heavy, efficient aiming was not difficult, making it highly functional on the battlefield.