ALS (Automatic Locking System) secures weapon once holstered; simple straight up draw once release is deactivated Holster is optimized for MOLLE vest use (OMV), with lower center of gravity than most other Safariland duty and tactical holsters for less pulling on vest Open-top design without SLS for quick retrieval of weapon Adjustable vertical leg strap with quick-release detachable leg harness Suede lined to protect handguns finish This 6385 OMV open top holster features the Automatic Locking System (ALS), an internal locking device that retains the weapon in all directions with no snaps or straps to manipulate. This model is optimized for use with the MOLLE vest because the placement of the 3-hole pattern. Suede lining helps protect the gun's sights and finish. Gun fit: Sig Sauer P320C