Say hello to Marushin's new COP357 Heavyweight. As you can see from the picture, it has 4 barrels instead of one. Unfortunately it can only fire 4 times but that's it's only downfall. It looks more realistic than the other 2 and its weight makes it look deceivingly real to the naked eye as well as packacking quite a punch even for it's small size at around 250 fps on its good days.
Reloading it is rather interesting as you will have to pull back the rear iron site then the barrel will flip open. Each hole has its own hop up unit and you load one BB each, which is a total of 4. Insert the gas underneath the pistol grip and you're ready to fire!
This also comes in 2 different forms. The Silver Short Barrel version and the Silver Long Barrel verison.