... need to grab some Italians or Garlicdesign will make them all.
EDIT: high velocity Ansaldo 1941 model (90/53 mm) gun mounted in a redesigned nose. To be more effective in its new role, the size of the gun was increased from 90 mm (3.5 in) to 102 mm (4 in).
EDIT again: I think MG in the nose and back should be only one pixel thick, two pixels are usualy reserved for cannons or water-cooled MG's
This is the (partially wrong) text on wiki\en:
In response to a request in November 1942, the P.108A Artigliere "gunship" was developed for anti-shipping duties as an alternative to torpedo bombers. It was armed with a modified high velocity Ansaldo 1941 model (90/53 mm) gun mounted in a redesigned nose. This was considered to provide the best combination of precision and range of all Italian artillery, and in several versions was used as an anti-aircraft and anti-tank gun by the Army and the Navy. To be more effective in its new role, the size of the gun was increased from 90 mm (3.5 in) to 102 mm (4 in), a non-standard Italian artillery calibre, and fired shells weighing 13 kg (30 lb) as opposed to the standard gun's 10 kg (20 lb), with a muzzle velocity of over 600 m/s (1,970 ft/s)
The airplane never mounted, nor were projected for, the 90\53 gun. The gun was, since the beginning, the modified 90\53 enlarged to 102 (ad so, 40 was the lenght, in calibers) which can use the heavier 102 rounds (the 102 was a caliber used by italy for AA guns and for some naval guns).