Atlas Gunworks frame and build kits establish a premium wide-body 2011 foundation for Open and Limited competition projects. These components bring the machining standards, geometry, and platform consistency expected from Atlas to builders who are specifying a gun around their own slide, barrel, grip, trigger, and recoil-system choices. Steel and aluminum options allow the build to be balanced around durability, weight distribution, and the intended division setup. A steel frame can support a planted, high-round-count Limited gun, while an aluminum configuration may suit a shooter pursuing a different overall handling target; the correct answer depends on the complete system rather than frame weight alone. Wide-body 2011 frames require deliberate parts matching, including the slide pattern, grip module, mag catch, fire-control components, magazine format, and any optic or compensator plan. Confirm machining status, dust-cover style, rail arrangement, frame material, and manufacturer-specific compatibility before ordering. These kits are for experienced fitting and custom assembly, not a shortcut around the normal barrel, slide, and ignition work required by a match-grade pistol. Build from the frame outward with compatible Atlas-spec components and a clear division objective. Fast same-day shipping on most orders at Shooters Connection.