I know Wikipedia is the new Encyclopedia Americana for the children of the '80's, but getting back to one of my questions, if an HK MP5 has a semi auto (SE) trigger group, is that firearm a carbine, SMG, rifle, howitzer, pistol??? What is it? And there are numerous examples of that 'style' of firearm.
Again, if you want to call it a carbine, where do we put that definition, as it was first called in reference to the short Italian cavalry rifles, that term was originated for? Carbine was not conceived for pistol calibre firearms, it's a rifle.