When convicted he faces ten years in prison. Democracy, America, and society as we know it cease to exist. If a person with a felony or criminal background, or who is otherwise interdicted from the possession of a firearm attempts to purchase, or is found in possession of an illegal gun, they go to jail . Burglars, muggers, robbers and carjackers now know that the person they are approaching may not only have a legal gun, but will be trained in its use. Violent crime and murder rates drop.
Citizens remain secure in their persons and property against criminals with guns.
As the legal guns per-capita in the US has risen, the violent crime rate has dropped. As soon as Great Britain banned all hand guns, the rate of gun related death began to increase. The same is true for Australia. The media inspired fear of 'Highway shootouts' and every city becoming a 'Dodge City' just didn't happen. No police officer has been shot by a person with a Concealed Carry Permit, but many have been assisted or saved by citizens with legal guns.