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| caliber=40 mm | weight=320 lb (134 kg)

<!-- Artillery specifications --> ...e firing at maximum elevation. These guns had a useful life expectancy of 320 to 400 EFC.<ref name="Campbell"/> These guns and the type E twin turret wi

|name= ''Cannone navali da 320'' |caliber={{convert|320|mm|in|sing=on|sigfig=2}}<ref name="Campbell"/>

...317.5|in|mm|sigfig=4}} (31.75 calibres)<br>Mks II - IV : {{convert|320|in|mm|sigfig=4}} (32 [[Caliber#Caliber_as_measurement_of_length|calibres]])<ref n |caliber={{convert|10|in|mm|sing=on|sigfig=4}}

...heinmetall|Rheinmetall-Borsig]] '''MK 103''' was a [[Germany|German]] [[30 mm caliber]] [[autocannon]] that was mounted in German combat aircraft during ..., though still superior to that of the MK 101. The Armour-piercing 30&nbsp;mm cartridge retained a full propellant charge, as the resulting higher muzzle

...ry armament, by the end of the war, with RPC first appearing on Vickers 40 mm (Pom Pom) 4 and 8 barrel mounts in late 1941.</ref> ...of WW2</ref> It could compute firing solutions for targets moving at up to 320 knots, or 400 knots in a dive. Its installations started in the late 1930s