GelStrike Rapid blasters shoot a ball that is much smaller than a paintball and launch it without having to use a large air tank, without as much velocity, and they are even safe to use indoor! These are a great option for something fun to do at home, for anyone too young to play paintball, or just to do some fun target shooting. The Gel Balls that these utilze come condensed in a small package, but once you add water to them for roughly 3 hours, they grow to be much larger that are ready to be used. The Rapid Blaster runs off of rechargeable batteries that charge quickly and they can even be upgraded with laser sights, tracer units, and even a range extender. What is great about the GelStrike pellets disintegrate on impact, dry out quickly, and then dissolve to dust making the clean up a breeze.