This is a STEEL 7-round magazine for 1911 pistols in .45 ACP.
These 7-round magazines are built from heat-treated carbon steel, with a high-tensile music wire spring and numbered witness holes for each round. With a welded base plate and a blued, or nickel finish, these magazines look and feel like traditional G.I. mags, with crucial modern upgrades. Mec-Gar®’s 1911 magazines combine the most trusted manufacturer in the magazine world with history’s most famous semi-automatic pistol design. Constantly improving on materials, manufacturing and design, these mags are the perfect upgrade for your favorite .45. Mec-Gar is a family-run business that’s produced over 100 million magazines in the last fifty years, making them the top choice for military, police, and professional shooters from all over the world.