33 Round Magazine - GlockThe high quality spring and follower ensure reliable feeding from the first round fed by a fully compressed spring down to the last shot. Reliability if the going gets tough. Exactly what one would expect from a genuine Glock Precision engineered product. GLOCK Magazine 33 rounds features Composite fabrication of toughened steel and Glock Polymer 2. Viewing ports for visual confirmation of loaded rounds High capacity twin stack design Heat treated