24/7 Wall St. compiled a list of the most popular guns in the world by reviewing various sources, such as GunBroker.com, Small Arms Survey, and more to get estimates of global gun sales.

14. The Magpul FMG-9 is a submachine gun that folds up into a rectangular block the size of a laptop battery. It's mostly made of a lightweight polymer rather than metal. 13. It's not technically ...