Many have asked about the ATS for the Ruger 1911.  Here is one (a light weight commander) with our sights:  I used a Springfield 1911 rear sight and a Kimber front sight base.  Actually, Ruger 1911’s, I believe, are supposed to be Novak cut dovetails.  However, I found it to be less fitting work to use the Kimber front sight base, as opposed to Springfield 1911 front sight base.  

Though most 1911’s will zero a 230 grain bullet at 25 yards with between .020 and .026 inches of shim, this particular Ruger 1911 used much more shim.  The pistol itself, after a 300 round break-in, was very accurate and not at all unpleasant to shoot for such a light pistol.