Is gun control a moral obligation?

Recently, I engaged in a conversation concerning gun control in this election and found myself sinking into an inescapable quicksand that finally forced me to concede complete ignorance on the topic and its place within Catholic teaching. In a speech from 2007, McCain stated his opposition to strict gun control using the constitution as means of defense, asserting, ""I strongly support the Second Amendment and I believe the Second Amendment ought to be preserved — which means no gun control,". By means of a refresher, let me provide the Second Amendment in it's original form: A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms shall not be infringed.
Moreover, in a recent CNN article, nearly two-thirds of Americans agreed with Senator McCain and his support of private gun ownership; however, what I can't seem to reckon or understand is the connection between private gun-ownership, and the role of guns within a Christian community. On one hand, I fully understand the desire to own something that can protect and defend oneself, loved ones, family, etc., and the power felt through owning something that can efficiently and effectively reach an ultimate end: the termination of life. What I also understand is the moral groundwork underlying the necessity to fight evil and therefore the use of said object to reach that end. In fear of sounding too pacifistic, I will assert the importance of guns in appropriate situations; however, I am merely wondering why this object should be allowed within the private hands of free-willing human beings who, by their very nature, have proved to killing others without a present threat or evil.
As always, McCain supports and endorses issues that follow suit with his morals and principles, despite how appealing or effective they may be. An example of this can be seen in his stance on the issue of abortion. His moral conscious trumps the desire to appease those advocating pro-choice within America. However, turning to the issue of gun-control, I question the source from which he draws from in regards to this specific moral issue. Firearms in their material nature are not bad, therefore, is it just for any human being to own a firearm, correct? Logically speaking, yes. Is it then right to assume these said owners will use their firearms in a just and responsible manner? Hypothetically speaking, it should be easy to conclude. Nevertheless, the United States is plagued with school-shootings, irresponsible gunfire, and murder caused by a guns on an near daily basis. Therefore, I believe it is a moral obligation, religious and secular, to control distribution and use of guns in America. Unfortunately, research has turned up nothing in terms of the Catholic Church's stance and moral position on gun control; And, while I understand McCain must look through a secular, constitutional lens when developing his stance on no further need for gun control, I believe it is the moral duty of the Church to guide it's followers towards a life devoid of such deadly objects by endorsing heavier gun control laws in America.