On duty - Retention & deployment, I use a Blade-tech WRS Level 2 duty holster, plenty secure, very fast.
Off duty/Concealed carry - Deployment, usually a leather OWB open top.
"If violent crime is to be curbed, it is only the intended victim who can do it. The felon does not fear the police, and he fears neither judge or jury. Therefore what he must be taught to fear is his victim." - LtCol Jeff Cooper