Abstract: A pneumatic container and a paintball gun containing same, and a pneumatic recharging system are provided. The provided pneumatic container is a quick rechargeable air cylinder for serving as an air source for paintball guns, which can be recharged quickly by connecting a larger carbon dioxide (CO2) tank to the pneumatic inlet located on either lateral end of the cylinder or at the bottom end of the cylinder by an adapter with a remote line connector. The provided pneumatic container can also be used as an air expansion chamber when mounted to a paintball gun or marker.