Abstract: A magazine includes a body member having a front, a back, and opposing side walls that define a first orifice at a first distal end of the body member, a retention plate member having a base, end wall, and retention spring portion, and a planar engagement surface extending from the base portion at an oblique angle relative to the base portion, wherein a portion of the front wall of the body member is disposed in a gap defined by the end wall portion and the retention spring portion, and an end plate member slidably engaging the body member, the end plate member having a base portion that defines an orifice having an engagement surface defining an oblique angle relative to the base portion, wherein the planar engagement surface of the retention plate member is disposed in the orifice in contact with the planar engagement surface of the end plate member.

Abstract: A magazine doubler includes a resilient body with two cavities each having upstanding ribs to carry magazines therein at different heights. A bracket and spaced screws are mounted medially between the front and back of the body to squeeze the body to generally conform it to carried magazines therein. A blocking element is used to replace the top round in one magazine to prevent the upper round from being dislodged during use of the doubler. Such element is tethered and biased by a rubber band looping around one of the screw shanks.