Hi Maxstuka!
I fell in the same mistake a while ago, believing there existed a 4-cannon version of the A6M5 in WWII, but there was not. My misinformation came from other simulators and online WWII airwar games common wrong info. I was given the correct info by my good friends here at SOH and now I think it's my duty to reciprocate by passing it onto you.
The above A6M5 is actually a "C" version, or A6M5c, armed with the usual long-barrel 20 mm. cannons with added an outer pair of 13 mm. machine guns, almost doubling its firepower. The aircraft was deployed factory configured with the usual cowl-mounted 7.7 mm, but one was routinely removed in the field to save some of the additional weight due to the extra 13 mm. mgs plus ammo. In some cases, both 7.7 mm. cowl guns were removed.
The model and paintscheme you attached identifies that A6M5c Zero as built by Nakajima, due to its longer, less tapered prop spinner and a particular rear fuselage paint scheme, where the underside grey paint curves up over the fuselage after the "Hinomaru" roundel, reaching the tailplane underside.
Mitsubishi-built aircrafts had shorter, rounder prop spinners and a straight line dividing the upper green paint from the underside grey, starting from the wing trailing edge all the way to the tail cone.
A while ago, Old Wheat and I worked on a A6M5c version of the stock A6M5 overhauled by The B24 Guy, I then brought the same modifications over to Akemi Mizoguchi's A6M5, thus creating two "C" variants of exhisting CFS2 A6M5 models.
ChrisN then provided a nice repaint for Akemi's model, creating an historical livery for the A6M5c Zero flown by Japanese ace Takeo Tanimizu, here:
http://www.sim-outhouse.com/sohforums/local_links.php?action=jump&catid=60&id=7805
Rami: mod packs should be available here at SOH. If not, let me know and I will re-upload them.
Cheers!
KH :ernae: