Quick change magazine coupler

A magazine coupler utilized to attach a first firearm magazine to a second firearm magazine, the magazine coupler comprising:

• a coupler body including a first coupler body flange;
• a first magazine attachment interface coupled to the coupler body and configured to removably mount a lower end portion of the first firearm magazine to the coupler body;
• a second magazine attachment interface coupled to the coupler body and configured to removably mount a lower end portion of the second firearm magazine to the coupler body;
• and
• a finger aperture extending through the coupler body, the finger aperture sized and shaped to enable a user to spin the magazine coupler about a finger of the user when inserted through the finger aperture to vary which of the first firearm magazine and the second firearm magazine resides in an upright orientation for insertion into a well of a firearm when the magazine coupler resides in a deployed state;
• wherein the finger aperture extends through the coupler body along a finger aperture centerline;
• and
• wherein the first magazine attachment interface is hingedly joined to the first coupler body flange for rotation about a hinge line extending substantially parallel to the finger aperture centerline.