When I was in the Navy, I qualified ONCE with a 45. I never owned my own handgun. About 8 years later flying missions off the coast and inland to western Africa I was asked if I had qualified with a 45. I said, "Yes." They said, "Here ya go," and handed me a weapon to fly with. At that time I was as equally likely to shoot my own foot off as to hit the enemy.
Now, in the Army National Guard, I requalify every year with multiple weapons. I have deployed and carried everyday on deployments. I have a CCL and own and practice with many of my own weapons.
In my early years in the Navy I would have no business carrying a weapon everyday at work without a significant amount of training. Now, I feel much more qualified, although I would love more training. I am legally allowed to conceal carry at work now as a full time FLARNG member. I believe somewhere between my younger years and lesser experience and my current experience lies the minimum threshold for responsibly carrying a weapon as a military member. There are quit a few more qualified than I am. We have current and former law enforcement members in our unit. But, there are some that it would scare the hell out of me to see printing a weapon at work.