t4e tb 68Umarex has a super cool "SPAS12" like paintball gun that uses . 68 bullets. It comes with a 16 shot magazine built in and has a 12g CO2 cartridge as a propellant, note you can shoot a magazine with one cartridge. This model comes with their quick pierce system, where you can have the gun ready with a CO2 cartridge and the magazine filled. When you want to use it, you just have to "hit" where you put the CO2 cartridge in and it will then be released