Yes, but for some reason in some other countries police is able to prevent suburbs from deteriorating into gangs warzone. So it’s either problem with police or availability of legal guns countrywide also have certain effect on illegal distribution by making it easier (steal a gun, sell your legal gun to some guy without license, etc).
Still there are lot of times when ex-con involved in another and yet another shooting. It means that punishment is not so severe. I'm not saying life sentence, but still less than 15 years for carrying and using illegal gun seem too lenient punishment to me.