Comp-Tac PLM Mag Pouches are made of 100% Kydex for the smoothest, fastest draw. Perfect for gun competitors or any shooter who would like to carry an additional magazine while at the range. The push-button locking mount (PLM) attaches to belts with a simple push of a button. When attached the button slides horizontally to lock the mechanism. With 9 mounting holes this magazine pouch has 270 cant adjustment. Mount can be adjusted in 1/4" increments from 1/4" to 2 1/4". NOTE: These magazine pouches are reversible allowing the customer to carry their magazine with the bullets facing forward or rearward. If you order a RSC (Left-handed Shooter) the retention screw will be toward the rear of the body when carried on the user's right side. Compatible with Glock 9/40/357, .45 Gap.