I am starting my christmas shopping (Yes, I'm on of those people that like to be finished before the season even starts and I am looking for a OWB holster for my dad. He recently bought a glock 19 after shooting mine and liking it. Number one concern here is concealment. I suggested IWB but he wont have anything to do with it. What do you folks consider to be the best holster for maxium concealment for carrying OWB?