Most sports stores will have them. Wal-Mart might have them. But E-Bay I know has them.
You cannot buy different sized shotgun magazines. However, I suggest getting a shotgun that takes airsoft shotgun shells. It will expand your options of bullet capacity.
Some shells hold up to 15.
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.
No.
I have never seen nor heard of a revolver airsoft pistol with non reusable shells. You should have no problems reusing them.
Most commercially available shotgun shells come in boxes of 25.
Yes.
Air soft shotgun shells are the size of 12 gauge shotgun shells.
A pump airsoft gun is a gun that has to be pumped every time before shooting. Ex. Airsoft shotgun
Find someone who reloads shotgun shells. They will relieve you of your inventory.
280 fps
$25-50