Abstract: A firearm magazine holding device includes an elongated main body for being positioned within the door pocket of a motor vehicle. The main body includes an elongated general storage compartment and a plurality of firearm magazine slots. Each of the firearm magazine slots are oriented vertically for individually receiving and positioning a firearm magazine vertically within the device. Each firearm magazine slot includes a foam lining along the interior surface for engaging different sized firearm magazines within each slot. In some versions the main is manufactured to fit a specific vehicle and includes a shape and size that is complementary to the shape and size of the vehicles door pocket. In other embodiments, the main body is manufactured to fit a variety of different vehicles and includes a mounting lip along the front surface and an adhesive strip along the bottom surface and/or other surfaces.