Freedom I agree with you that guns should not be placed in the hand of common citizen.

If common citizens are to be able to get guns to protect themselves then maybe they will want to have bazookas, grenades and tank in their house too after all who knows how the enemy can come to them. Maybe common citizen should also have anti aircraft missiles too just in case someone comes to attack them using a helicopter.

If each citizen has the burden of protecting themselves then there's no need for police.