Description The Arredondo Glock Mag Extension increases the capacity of your Glock magazines ( 6 for 9mm, 5 for .40 S&W, 4 for .45 ACP/10mm). Comes with extended 10% magazine spring and dissassembly tool. Watch the installation video to fully understand how this item fits and functions. • USPSA limited 140mm length legal • Magazine not included • Will not function in post-ban, 10 round magazines
