practice, handy size and wt, (even with can in place) can = TREMENDOUS advantage, and so does concealability. Fuck what the military wants or does. It's irrelevant to the civilian. While you are wasting 20 rds on that car, tree, or building, some OTHER enemy will kill you. Your lack of practice with the .22 unit, your flinching from the lack of a can, the lack of night sights, the lack of ability to shoot DISCRETELY will kill you. or your stupidity about being in the open, in daylight will kill you.