Why does a 'BUG' have to be a 'mouse' gun? I see a "Back-Up Gun" as a relative term. Any time I am wearing a weapon at my default carry position, it is 'Primary," while any other weapon that is carried elsewhere, on or about my person, is a secondary/tertiary weapon, a.k.a. BUG. Depending upon the circumstances, I might actually reach for a weapon other than my 'Primary' handgun, which then momentarily relegates my 'Primary' handgun to 'back-up' status. My "Primary" handgun, on my "strong-side" hip, may well be a G19 or SP101, while a Safepacker, Hill People Gear Kit Bag, or shoulder rig carries a G17, 1911, or medium/large-frame revolver. So, yes, my "Primary" weapon might be a smaller weapon. My only "mouse" gun is a Seecamp LWS-32. It is impractical to qual with it, on my employer's present "off-duty/back-up" qual course, so I very rarely carry it in public. I am likely to retire in 2017 or 2018, so the Seecamp may see more carry time after that. As for the poll, my "write-in" vote is "not applicable," or "none of the above."