Being in agreement with points on both sides of the fence, or rather, it might be better to say I don't agree with all points, lol, I would just say that this is a matter where every man has to come to a conclusion himself as to whether they should carry a gun.
The first point I would make is the OP is a member of the Military, and often the Military are exposed to scenarios the general public is not, so I view that kind of a man to deserve special consideration.
Secondly, for those of us who do not feel compelled to bear arms, and trust God in this matter, that is not something we should expect everyone to share.
Third, if we look at what Scripture teaches in regards to the punishment of evil-doers, I myself have not found anything that suggests the Church be armed, and be the ones enforcing justice.
Fourth, the issue of the right to bear arms doesn't really have a place in this thread, and that issue is not open to debate. It is what it is.
Fifth, much of the abuse of arms by the criminal element in this Country results in the deaths of...other criminals. While there are innocents (collateral damage), we have to recognize that the abuse of this right isn't grounds to restrict the rights of law-abiding citizens. I have yet to hear of someone suggest we restrict/remove driving privileges based on those convicted of drunk driving. They don't close all the stores because some shoplift.
Basically, my view is that I do not feel compelled to carry a gun. Like CBTS, I go into dangerous neighborhoods, and while I'll be honest, there have been times when I might have wanted one, it's just not something I see a need for. However, I can't say that my brother, who feels either a need or a duty to carry one, should be viewed as disobedient or weak in faith, because some will view this from a perspective of preparedness. I would prefer that those who do carry were people well trained in gun safety and responsible people, someone who is not going to, by having a gun, complicate a situation. But as I said before, I don't have a problem with someone carrying a gun into the Church.
I'll tell you something that bothers me worse: someone carrying a cup of coffee into a church. This, in my view, show a lack of reverence for the worship service. Seriously, we can't go 2 hours without a cup of coffee?
Here is one last thought on the subject of guns in our country, and what cannot be denied as a serious problem, which is the number of people killed every year in our country: if we actually enforced justice we would see this problem decrease. What I mean by that is this: many of the criminals that carry out the offenses that rack up the stats should have never been in the position where they could commit those offenses (again!), but we see that oftentimes they are repeat offenses.
It is true that despite gun laws...the criminals are going to have them, What we need to do is make sure that criminals are not allowed the chance to commit these crimes (again!).
So two words: stiffer sentences.
The Law of God makes it pretty clear, intentionally take the life of another and your life is forfeit. How many people kill others and are out of jail again to commit the same crimes? Stiffer sentencing is preventive, in my opinion.
God bless.