i noticed the mossberg 500 airsoft mag can but i cant find any
It all depends on the model your looking at. So, to make it simple, elaborate. My pump action M56A uses airsoft shotgun shells, that act as magazines. So in a real shotgun, when the shell of a shotgun is fired, the Shell ejects, and the bb's fire. In an airsoft shotgun, depending upon the model, a shell shotgun fires 1 or 3 bb's, and without ejecting the shell, you pump again, causing more pre-loaded bb's into the chamber. But in some Airsoft shotguns, they use Magazines. You insert the magazine into the underside of the gun, and when you re-pump, bb(s) load into the chamber. That would be the logical answer. You used the word "Have". Do i "have to use shells". There are magazine alternatives, and you can always do it the good old fashion manual loading method. You could "screw" the loading mechanism, and manually force the bb's into the chamber. Not recommended. Any more questions, email me.
Actually, you can not
Yes, any airsoft gun can shoot any weight of BBs, depending on how good the gun is, the heavier the BB. Handgun-20G Assault Rifle/Shotgun-.2G-.3G Sniper-.3G<_.
Any airsoft gun. Yes
Let's hope you don't have shotgun shells filled with nitroglycerine! Shotgun shells are limited in power because shotguns are not cannons, They are very light weight weapons. Gunpowder (any of several types) lasts virtually forever if kept dry.
Any spent plastic shotgun shells (hulls) should be reusable, as long as the brass is re-sized before reloading. Paper isn't recommended, and brass casings are practically non-reloadable.
Any gun store sells it. Commonly shotgun shells #8 or #9 shot.
Airsoft and helicopters don't work well together because the wind from the propeller will blow the bb.
No, you can not shoot anything but 12 gauge shotgun shells through a 12 gauge shotgun. Never use any ammunition other than what the firearm was designed for.
You will have to find someone who specializes in collecting them. Otherwise, they are not worth any more than a regular box of shotgun shells.