The Esstac GAP Pistol Magazine Pouch fits 9mm, 40cal, 45acp Double Stack Magazines. Glock19 magazines are the shortest magazines you want to use in these pouches. Due to the GAP's in the pouch, it is intended to be used on belts and will not line up with MOLLE/PALS webbing. It is recommended to be used with belt loops, as WTF straps are not designed to be used with non-standard "mini" pals webbing found on belts.Note- Will not work for Glock26 or similar magazines they too short in height.FeaturesFits 9mm, 40cal, 45acp Double Stack MagazinesGlock19 magazines are the shortest magazines you want to use in these pouchesIntended to be used on belts and will not line up with MOLLE/PALS webbing Recommended to be used with belt loopsWill not work for Glock26 or similar magazines they too short in height