We only sell and use disposable, one time use, metal, threaded (3/8" by 24 threads per inch) Co2 cylinders made in Austria. Austrian made cylinders are the only Co2 cylinders relied upon world wide by the FAA (Federal Aviation Administration) and SCUBA divers for life vests. They are the most reliable Co2 cylinders made in the world! When you put your professional reputation on the line (or your life if a SCUBA diver), you want a Co2 cylinder that will work perfectly. This is why we only use these Austrian made cylinders. As an additional safety measure, these are screwed into a metal sleeved release mechanism firmly attached to our launchers. Using any other brand of Co2 cylinder will void your lifetime warranty on all SEI’s Launchers and Cannons. These gold colored cylinders are engineered to work with our launchers. The welded cap is concaved to guide the piercing pin to dead center. Our cylinders are manufactured to stringent military specs. They are heated to a high temp for an extended period of time to ensure there are no leaks. These are food grade as used in seltzer making machines. They are even used in the medical field.

Keep in mind, other cylinders, might cause the pin to hit off center and create a misfire. The pin might also be damaged if an off brand cylinder is used.