Gun safety isn't the issue. And yes, it really is that simple since about 80% or so of all gun crime in the US is gang related. Gangs are centered in the largest cities so targeting them would in fact reduce gun violence a lot. Raising the purchase age is just another infringement on citizens rights that won't do shit for problem just like it has done nothing with drunk driving and so on. The biggest decrease in drunk driving deaths has been due to increased safety features in cars and improved emergency medicine.