Manufacturer Part Number ( MPN ) : SF7354This open top tactical holster features the Automatic Locking System (ALS®). Once the weapon is holstered, it locks into place. When the ALS is de-activated by the thumb, a simple straight up draw is used. This model is constructed of the innovative SafariSeven™ material, a unique nylon blend from DuPont™. SafariSeven™ is highly durable and practically impervious to the elements.