Some reading for you:
http://www.livescience.com/27740-gun-laws-deaths-study.html
http://www.livescience.com/1216-homicide-rates-higher-states-guns-home.html
Here's a quote from the first one:
And gun laws and gun deaths were related. The states in the top 25 percent of gun legislation strength had a 42 percent reduction in gun deaths compared with the states in the bottom 25 percent. That number included a 40 percent drop in homicides and a 37 percent drop in suicides.
In absolute terms, the states with the strongest laws had 6.64 fewer deaths per 100,000 residents than the states with the weakest.
Notably, when gun violence was lower, other types of violence did not go up, suggesting people without guns do not kill themselves or others by other means, Fleegler said.
Another study:
http://news.stanford.edu/news/2014/november/donohue-guns-study-111414.html
"The totality of the evidence based on educated judgments about the best statistical models suggests that right-to-carry laws are associated with substantially higher rates" of aggravated assault, rape, robbery and murder, said Donohue.
Another one:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2759797/
Results. After adjustment, individuals in possession of a gun were 4.46 (P < .05) times more likely to be shot in an assault than those not in possession. Among gun assaults where the victim had at least some chance to resist, this adjusted odds ratio increased to 5.45 (P < .05).
Conclusions. On average, guns did not protect those who possessed them from being shot in an assault. Although successful defensive gun uses occur each year, the probability of success may be low for civilian gun users in urban areas. Such users should reconsider their possession of guns or, at least, understand that regular possession necessitates careful safety countermeasures.
All these are US based studies. That's not even looking at other countries with successful gun control measures that your nation could learn from.