keep in mind,that you are not looking for a defensive weapon. This thread is about an assasination tool. Set up right, you are probably not gonna need 20 rounds of 9mm from a polymer wonder. A revovler seems to fit the bill better, as a misfire just requires a pull on the trigger. Imagine a hitman taking time to tap and rack the gun if there is a bad round, a feeding problem or a failure to eject. Add that to the advantage of not leaving any casings behind and i think its shortcommings is outweighed by this.