>>514926804
the bushmaster has airburst too. but, really, how often do you need that? what the gun is going to be mostly doing is being a bullet hose fucking up lightly armored vehicles and structures and whatever else offends the vehicle commander.
the 40mm i think was sort of a compromise decision because they wanted to make a M10 Booker not a light tank HE slinger thingy to thump bunkers and shit. which, if properly built, is going to need more than that to deal with than a 40mm anyways. you would just shoot a spike at it and be done with it. so i don't get it. the trade offs of volume of fire and ammunition capacity just don't seem worth it.
the advantage of the CV90 is the armor layout, powerpack, FCS, sensors, etc. not the gun which really isn't any better than a regular old M242 25mm bushmaster on the battlefield.