Funny idea but you are asking for a lawsuit in return by firing any gun even with nonlethal rounds. If you just have to pepper blast a burglar it would be better to use a paintball gun with pepper balls, that way at least it cannot be shown you fired a real gun so no attempted murder charges. Really though, and not even trying to sound badass but if you absolutely must deal with a burglar in your home, just get the shotgun and shoot to kill. No half-measures right? No shortage of people getting sued, and losing, by scumbag robbers who got injured while robbing houses. If there is a body inside of your house walls, it's a pretty open and shut thing as long as your gun is clean. But if you leave a body in your yard outside the house, or if you use an illegal or unregistered firearm, or you don't kill the s.o.b. you are just asking for serious trouble.