I have a couple Looper OWB 3 slot holsters for my G19 & 1911. They do not have the top retention strap or anything. Are you all using the same OWB holster you have for OC? Or are you using a holster with a retention device like a top strap or Blackhawk? I'm just trying to decide if I need to get a retention holster if I decide to OC.