The VersaCarry spare magazine leather magazine holster is adjustable to allow for the various magazine designs within a particular fitment. The magazine holster features an adjustable tension screw which allows you to tighten and increase the tension on your magazine. The FlexVent technology adds dexterity to the leather for faster molding of the magazine to the holster and improved airflow for moisture dissipation. Your magazine must conform to the general form factor outlined below in the fits section. Specifications and Features: VersaCarry Magazine Holster 71102 Single Stack Magazines Spare Magazine Storage Ambidextrous OWB (Outside the Waistband Compatible) Adjustable Tension Screw FlexVent Technology Leather Distressed Brown Fits: Single Stack Magazines