You can carry as many as you like, but why open carry 2 handguns? You'll only look like a goof with a gun. If you are going to carry 2 handguns I'd strongly suggest getting a CCW permit so that you can conceal the BUG. You can still open carry the duty sized pistol. Thats my opinion on it and probably how I'd do it but when I'm not working I don't open carry due to agency policies. Its concealed carry for me. I've got no issues with people wanting to carry 2 guns because carrying a BUG is a good idea, just don't look like a nut while doing so.