Well, the UK averages about one gun related death per million in population. The US has a population of 319+/- million so the number of gun, with the same ratio should be around 319 a year, even 350 would becachigh number. In 2013, the CDC reported over 11,000 homicides, over 500 accidental deathes and over 200 undetermined gun related fatalities. Does not include self defense or police shootings. About 35 gun related deaths per million a year versus the UK's one per million.
Check other countries and their gun control laws and see how they fair.