The present disclosure provides systems and techniques that can be implemented in a gun. The gun may include a magazine retainer that is capable of retaining a magazine within a magazine well of the gun, and the magazine retainer may be operable to controllably release the magazine from the magazine well on demand. The magazine retainer may include a first paddle extending radially in a first direction from an axis of rotation, a second paddle extending radially in the first direction from the axis of rotation, where the axis of rotation is defined through a transverse member of the second paddle, and a catch extending radially in a second direction from the axis of rotation, where the catch is coupled with both the first paddle and the second paddle such that rotating the first paddle or the second paddle results in displacement of the catch.