M will do.

Thanks a lot for your kindness, Jason.
Other than that, here's the 37mm - didn't care about the stock SH4 deck gun's polygon count, so I may have to decrease the polygon count of this one in the meantime (yet it's not THAT high actually). But at least we'll have a chance to see if the game can handle it as it is. Keeping my fingers crossed.
P.S. : Anyone got some link to a blueprint of the 40mm ?