KRISS MAGEX2 G21 17RD 3PKThe KRISS MagEx2 Kit for Glock 21 +17 Round 3 Pack is designed to significantly increase the capacity of your standard Glock 21 magazines. Each kit in this 3 pack adds 17 rounds to your . 45 ACP G21 magazine, making it ideal for use with KRISS Vector firearms or compatible Glock platforms. This kit offers excellent value for those looking to upgrade multiple magazines. Features Specs: Caliber: . 45 ACP Capacity Increase: +17 rounds per magazine