Glock Magazine Catch 9mm Slim, 10 Round Magazines for G43X, G48Genuine OEM Glock magazine catch designed for 9 mm Slim Glock pistols, specifically the Glock 43X and Glock 48 models. Its a reversible polymer magazine catch made to factory specifications to reliably retain and release your magazine during normal operation. Whether replacing a wornout factory part or keeping a spare for maintenance, this mag catch provides the precise fit and function Glock owners expect. Meant to be installed on 10 round magazines.