This simple adaptor is easily installed as you would any normal Airsoft Shotgun Shell, however this has a mag-well attached to the bottom that will accept all kinds of M4 and M16 family Magazines (often referred to as 5.56x45 STANAG). Whether you have a Gas Shotgun or Spring Shotgun, this is the perfect way to get more out of it and be more effective on the field. Stop having to reload every ten shots and get laying down the suppression in battles.