This is a 9mm 9-round magazine for 1911 pistols.
Built from durable, heat-treated steel, these 9-round single-stack magazines are designed for use with 1911 pistols chambered in 9mm. Features include numbered witness holes, music wire spring internals, and flush-fitting steel base plates. Improving on John Browning’s masterpiece 1911 pistol isn’t easy—but Mec-Gar makes it work. Constantly enhancing materials, manufacturing, and design, Mec-Gar®’s 1911 magazines are some of the most advanced and reliable on the market today. With over 100 million magazines produced in the last fifty years, Mec-Gar is the industry leader. Their magazines are some of the most trusted among military and law enforcement from all over the world.