The cannone 65/17 modello 13 was Italy’s main infantry gun. It was designed as a mountain gun and to be light and easy to handle. However, it was used in just about all theatres.
It was an effective weapon and dispatched itself well on the battlefield. Its main drawback was it’s unusual calibre which required specific ammunition.
It was also used in the Spanish Civil War and WW1 and also used by Germany after the fall of Italy.
The gun is scaled correctly for 1:56 or 28mm. It was a very small gun. If you want, you could scale it by about 105% and it still sit nicely on a 60mm base.