Glock Extended Magazine Catch allows users with smaller hands, or those who like larger controls, a more comfortable experience with their Glock Pistol. Made from quality materials, the Glock® Magazine Catch is sure to stand up to years and years of use. Polymer-Black. Glock Extended Magazine Release For Glock 17, 19, 22, 23, 24, 25, 26, 27, 28, 31, 32, 33, 34, 35, 37, 38, 39