Bullwinkle you wrote:
"Now Rick, nothing controversial...Two questions actually..I had the opportunity to train with Houston PDs SWAT team, and got flashed with a 'practice flashbang' (I'd hate to see what the real ones do to you)...My question is, are these available to civilians (the practice ones)..."
Answer: No, not at least the ones available to LEO's and SWAT elements. The cyclinder that you saw (I'm assuming it was black) is actually the case for what is inside (the charge). The charges, both practice and actual service charge of the DDD(Diversionary Distraction Device) along with the body are to be registered with the ATF as a class explosive and therefore accountable inventory. And as one who has trained with the standard issue DDD, the real ones are no ladyfingers. They will blind and disorient even those who "expect" them when they explode.
"the other question was about is about pistol ownership...I was told by a friend, that a closing manager of a store, I am allowed to carry a handgun without a concealed liscence...That doesn't sound right to me."
Answer: Depending on your State laws: However, most States except DC (is that a State anyway?) allow for private carry of legally owned sidearms while on your premises. More than likely the stipulation being that it is holstered or worn in full view. Again, CHECK WITH LOCAL LAW ENFORCEMENT FIRST. Concealed carry laws are for outside of your domicile or business. At least for now, many the law abiding may still protect their loved ones and their lives (lets hope it stays that way).
Good luck.