Wilson Combat Flat Mainspring Housing Full-Size. Our mainspring housings are fully machined from bar stock with real cut checkering. These high quality housings are a drop-in upgrade for handguns with cast or polymer housings and the same parts used in our custom guns. Fully Machined from bar stock stainless steel with real cut checkering. Low luster glass bead stainless steel finish. Drop in fit for most full size 1911 handguns. Minor fitting may be required in some guns. Specifications for Wilson Combat Flat Mainspring Housing Full-Size: Manufacturer: Wilson Combat Gun Make: Colt Gun Model: Colt 1911 Quantity: 1 Package Contents: Wilson Combat Flat Mainspring Housing Full-Size The Wilson Combat Mainspring Housing Flat Full-Size Blue 92BF is a quality addition to the Wilson Combat lineup. For more great deals on Pistol Parts by Wilson Combat please browse our Wilson Combat Gun Parts page. What firearm models does the manufacturer say Wilson Combat Flat Mainspring Housing Full-Size is compatible with? The manufacturer says that Wilson Combat Flat Mainspring Housing Full-Size is compatible with Colt 1911WILS 92SF MAINSPG HOUS FS FLAT SS