Hi Gas filled air rifles are the best if you intend to use it regularly but they have draw backs if for light use. You get between 60 to 130 shots from a charge depending on which gun. To recharge you need a tested (every year) cylinder same as divers cylinder or need to go to someone who can recharge your rifle and then your cylinder needs to be filled I decided on a springer don't need all that hassle Cheers Homer 49