[W4lt3r]

After some searching in the Guns_Radars (1.2.3).sim files in the Library/ShipParts Folder, i managed to find the cannon stat, that had the 5s reload time and clip size of 2 and name of the 5in_Double_Barrels_Jp, and seemingly it was the right one after editing the ammo amount, since on last patrol i sank 32 vessels without running out of ammo, although was low on fuel on the end of the trip ^^'
But sadly, the thing holds AA ammunition, the cannon crew doesn't know how to fire on planes with 'em..

But, good work, gotta give ya that.