How does a bb shotgun work?
The Airsoft shotgun fires bb's that are contained inside the shells. These are pushed inside the barrel by the pump-action loading mechanism.
There are different types of pump-action shotguns with different types of mechanism: some use the pressure of Green Gas or Co2 to propel the pellet round through the barrel towards the target. Others use a Spring-Action mechanism, usually hand-loaded, which can sometimes be driven by an electric motor. In both cases, a large quantity of bb's is ejected from the shell and propelled through the barrel at high pressure. Once out of the barrel, the shot pattern will tend to widen as it moves away from the barrel.
The typical shot pattern of the Airsoft shotgun makes it particularly suitable for powerful close-range shooting, such as when clearing rooms or buildings in Airsoft CQB battles.