If you think that gun bans will reduce crime, look at where it has been tried. It should be much more likely to work in an island nation like Britain than the USA. Here is from a major UK newspaper:

Since the Government's "total ban" five years ago, there are more and more guns being used by more and more criminals in more and more crimes. Now, in the wake of Birmingham's New Year bloodbath, there are calls for the total ban to be made even more total: if the gangs refuse to obey the existing laws, we'll just pass more laws for them not to obey. According to a UN survey from last month, England and Wales now have the highest crime rate of the world's 20 leading nations.