The perpetrator has two significant advantages over the average person with a gun: He's first, and he's crazy. And if he sees the slightest hint that you're packing a gun, you're as good as dead. In reality, if he's close enough to want to take something from you, then he's close enough for you to use an alternative to a firearm. You'd be better off with one of these new high-tech 10 percent pepper gel devices made in Switzerland. I carry one myself and have never felt that a gun would make me any safer. At a deployment speed of 110 miles per hour (using airbag technology), and with an effective distance of 13 feet and a radius of about 2 feet, the gel can disable the perpetrator without killing him — all before he figures out what that gizmo is in your hand. Besides, you're psychologically more likely to use it without hesitating, knowing that it won't kill the guy.