US Patent 10126076 Magazine coupling device

A magazine coupling device includes two or more floor plate structures sharing a common base for connecting a plurality of magazines together to form a single connected unit. Each floor plate structure replaces a magazine floor plate secured to a bottom end of a detachable magazine. A release button receptacle extends through the base. A release button access channel extends from the release button receptacle to an outer surface of the base forming an access opening to allow access to the release button receptacle from outside the coupling device.