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The specified shell weight is all of three pounds heavier then typical 3in weapons, this is not a measurable advantage for shore bombardment and muzzle velocity is nothing exceptional either. Inferior to the postwar 60-70cal 3in weapons and not that far ahead of a US wartime 3in 50cal. This is a tank gun put to sea, not some super powerful weapon. 

Of course you might develop it into a completely different mounting, but this would then completely defeat the original point of the design by greatly increasing size and weight as well as invaliding the requirement for easily man handled ammunition. At that point it might as well get a longer barrel too, and higher velocity ammunition while you're at it. This is in any case just a validation of my assertion that CFS2 was doomed, if you think in terms of a totally different 84mm gun then sure, go ahead. As for use, I’d argue that use of the 76mm as a main armament simply reflects how marginal guns have become for any role and that the need for dedicated anti aircraft CIWS mounts shows just how serious the air threat became. Italy in any case, inventor of the OTO 76mm and earlier Allargato mount thinks very highly of it as a secondary armament. Its primary armament on a Horizon sure but with multiple guns specifically to facilitate AAW use.

Also looking around a little, navweapons claims that CFS2 was found to be too heavy for the intended coastal craft. I have no idea if this is true, but I can easily believe it would be if it was being intended for craft not much bigger then wartime motor gunboats. 


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