Not true. I carry mine in a simple BladeTech OWB holster. No locking mechanisms or the likes at all, simple friction and a pinch on the trigger guard. It does not have to be locked to carry open in California. The only stipulation to the person and weapon beyond unpermittable areas of carry is that the weapon itself must be dry, no cartridges inside or attached to the weapon. So I carry condition 3 with an empty mag.   and  are two great places to get further information on this. I started OCing around here on my own, then ran into a couple of these guys at a gun shop while carrying. I went to one of their get togethers, not my gig. I carry whenever off duty regardless of where I go, I just avoid schools and other restricted areas, and I carry alone(for now). Oh, what I said was true all right, but not for OC - for LUCC. The web is sparse on LUCC information but here's the one page I found on it:     http://thegunwiki.com/Gunwiki/RefLegalCaLUCC    Otherwise to get that info, you have to read 3-4 threads with a few hundred posts apiece over on Calguns.    Overall, LUCC is a win because law enforcement doesn't get onto you and you never get asked to leave anywhere. And you won't gain a higher radar profile from 12031(e) checks. AND you won't ever get just the wrong LEO who knows a home schooler in the area and gets a district attorney to go after you. Probably not a big deal in rural areas, but it's worth concern in urban areas.