Midwest Industries Alpha Series Folding Stock 100128 flexible holster body allows holster flexible holster body allows holster to mold around wearer Tension adjusment to customize tailor weapon fit to user preferences The 537 GLS Open Top Concealment Belt Slide Holster features Safarilands unique Grip Lock System (GLS) UPC: 812526020444 Category: On Gun & Other Accessories › Stocks Adjustable polymer cheek piece for comfortable use with all users Adjustable butt pad for increased usability with plate carriers or heavy gear 5 position locking beam with textured button for quick adjustment Heavy duty side folding mechanism constructed from 4140 heat treated steel Reversable design for left handed shooters Full length locking lug for maximum strength Solid positive lock up in both positions Steel clamp with large surface engagement Can be configured to right or left folding Compatible with firearms that include 1913 rail adaptor