Looking at what I consider a carbine length AR and a friend brings up the possibility of a pistol caliber carbine such as the Berretta Storm or the TDI KRISS Super V (I don't even think it's legal in Maryland) but I'm wondering how do you define a carbine? Would a short barrel AR and a Storm be a carbine or would you limit it to the type of caliber or what. Also I would be interested in opinions on pistol caliber carbines below 200 yards. I'm looking for Milk jug accuracy at 200 yards on my next firearms purchase and I'm now torn between an AR or a pistol caliber carbine. I feel both have their advantages (price vs accuracy etc...)but would like to hear from anyone with experience on the pistol calibers, I've read more reviews than I can count on AR's I know its a solid platform that can be customized almost without limits.