I have wondered this very thing for years now, I've got a Makarov that came with a flap holster that completely covers the gun. It is obviously a pistol holster, and is my belief that no reasonable person would assume it's anything other...but it would irk the heck out of me to wear it into a 7-11 or someplace to pick up a soda on my way out to the desert for some benign plinking, and get popped for CCW with the holster in broad view, in an open carry state. It's not really helpful that Colorado doesn't seem to have a real definition of what open carry actually consists of, so it's most likely left to the discretion of the cops. Not a bad thing, in and of itself...the average cop is more than capable of recognizing a gun holster...but everyone has their bad days or conflicts of personality. I guess, like many on this board, I'd rather leave that particular option at home and use a rig that makes it obvious what's in that odd leather thingy on my belt (or completely concealed, if your a CCW'er), than taking a chance on coming out on the wrong end of a possibly grey area. It's a bit of a shame, as I actually believe the flap holster mentioned is less conspicuous, and would tend to pacify the anti's palpitating hearts much better than my cocked and locked 1911 worn it's stead. Oh well...better safe than sorry.