There are over 10 million paintball players in the US alone that use this technology. The tanks are Department of Transportation (DOT) certified for automotive use and are used frequently in non-paintball applications as a result (the Ninja guys have some great stories, from automotive racing to special ops applications).
The actuator pressures used by KickMagic are regulated down to the range of shop air. All KickMagic pneumatic equipment is rated for these pressures with engineering safety margins.