IT IS A FLAK CANNON! you know, the weapon that we use to shoot down planes. If you want it looking like a shotgun and shooting like a flak cannon it would be pretty queer. besides, this model makes more sense than the last one, have you actually looked at it carefully? The Flak Cannon has dual firing modes, each being completely different. Therefore it is required that there are two different barrels, one for launching the shell as one piece(lower barrel), and one for launching flak chunks(upper barrel). Now how do you make it so that you can choose where one shell goes? well, if you look at the barrels it is clear that they connect halfway through the gun, so it is actually one barrel that splits, this probably works like a train track interesection or whatever its called. where what you press determines which way the shell will travel. Also, notice how in UT guns don't need to be reloaded, this is because they reload themselves. if you look at the bottom you can see a flak ammo container, above it directly is a revolver, this revolver would insert a new clip into the piece above it whenever one runs out. A gun of this caliber cannon be simplistic looking because it does not function like a shotgun nor is it a modern style weapon. if it was up to me the UT2004 Flak Cannon would have been much more complex looking also.