Glock is, indeed, popular:
If an individual is caught with a gun with the serial number rubbed off, that is also grounds for termination. There were various restrictions mentioned, as for example, you can't bring a weapon on a commercial flight. Police and military personnel, of course, maintain the current protocol. What about hunters? They need to be very, very careful that no one steals one of their firearms, with a fail safe system for instantly alerting the police if this happens. This concept is one form of gun control. However, this method only makes it easier for psychopaths to kill more people.