Safariland 578 GLS Pro-Fit Holster, Fits Standard Handguns (Similar to GL17, 20, 37), SafariSeven Frame, Left Hand, Black Finish 578-83-412 The Model 578 GLS(TM) Pro-Fit brings the unique GLS(TM) (Grip Lock System) and SafariSeven(TM) together in a holster designed to fit a wide variety of guns. The Pro-Fit(TM) is customizable and adjusts to securely fit over 60 firearms. The 578 also features the GLS(TM)" an innovative technology that automatically secures the weapon when holstered and releases it upon application of the middle finger with a standard shooting grip for a more intuitive and safer release. The holster body is constructed with SafariSeven(TM)" a lightweight" state-of-the-art nylon blend is completely non-abrasive to a gun's finish" tolerant of extreme high and low temperatures" and easy to maintain. This holster includes an injection-molded paddle and an injection-molded belt loop that is adjustable for maximum comfort and allows the holster to be worn cross draw.