Just one! I know it would really suck, and it's been beat to death on many an internet gun forum BUT it's still fun to hear what people have to say. Here we go. Later today the great giant purple gun eating monster from the 13th dimension will be paying us all a visit and will eat all of our handguns but ONE. At least the GPGEM will let us pick which gun he doesn't eat. What handgun that you currently own would be the one you keep IF you could just keep one? For me it would be my SIG 226 in 9mm. For me it is just the perfect mix of stopping power, fit, and function.