The Stainless Steel Mil-Spec is built on a full-size frame and slide. The pistol is made from stainless steel which has a polished finish on the flat surfaces and bead-blasted matte finish on the rounded areas. The 5 inch barrel is match grade and made from stainless steel. The slide features slanted serrations on the rear only. The mainspring housing is the original arched style found on GI issue 1911-A1s but it includes the Springfield Armory