Glock Magazine Variant History Posted March 3, 2016 in Companies, Pistols, Shooting Accessories by Nicholas C with 21 CommentsTags: glock, Glock 17, magazines TheShredBox has a detailed video explaining the chronicling the 17 different variations of Glock 17 magazines that have been made and released so far. For Glock fans and fans of variants I think you will enjoy this. I did.