That is a thought among many but does not solve anything. Look at countries where firearms have been banned. Nothing will change the mind-set of people with bad intent.
Like the UK where i live? or in fact most of Europe?

in 2012 the US has

over 60% of all homicides by firearm that's over 9000 (out of around 12000) homicides = that 2.97 per 100,000 people

in 2012 the UK has

we had 6.6% of all homicides by firearm that's around 40 (out of 550) homicides that's 0.07 per 100,000 people

it seems fairly obvious to me that if people dont have access to guns not only will gun crime fall but murder rates will fall as it is a very different thing killing someone from a distance by pressing a trigger then say stabbing someone which requires the murderer to be up close and personal with there victim.