How do shotguns work?

[Nickona]

hi,

 

I just realised that i have no real idea how airsoft shotties work! I know how the spring ones work just like any other spring airsoft gun but what i don't know are the gas ones that take shells.

 

The main questions are; is the gas in the shells and what happens to the shells after they've shot, a`re they ejected on the floor or do you pocket them to use again?

 

thanks

[joshcowin]

best thing to do is to find out how real shotguns work first as im sure they are similar designs

[Nickona]

i know how real ones work but with a real one you cannot re-use the shell and they're not gas,