John Browningâ€s iconic masterpiece meets perfectionist Swiss craftsmanship in a rugged, combat-ready package with Sig Sauerâ€s line of 1911 pistols. Constructing from surgical grade stainless steel, with wide witness cuts, thick music wire springs and polymer baseplate, Sigâ€s 1911 magazines are designed to function and feed reliably even in the harshest conditions, and built to Sigâ€s exacting specifications. These magazines are compatible with Sig 1911 pistols chambered in 9mm