You mentioned in the past the only difference between a MkIII 9mm frame and 40S&W frame is the ejector. Have you ever tried fitting a 40 slide on a 9mm frame and testing it. If so it seems as if some company started to offer aftermarket properly made 40 spec slides, a new 40 S&W could perhaps be built on a Used Mark III 9mm or perhaps Springfield 9 mm High Power. I recently saw a HP 40 slide with target sights on EBay but they wanted $750 for it.
You mentioned in the past the only difference between a MkIII 9mm frame and 40S&W frame is the ejector. Have you ever tried fitting a 40 slide on a 9mm frame and testing it. If so it seems as if some company started to offer aftermarket properly made 40 spec slides, a new 40 S&W could perhaps be built on a Used Mark III 9mm or perhaps Springfield 9 mm High Power. I recently saw a HP 40 slide with target sights on EBay but they wanted $750 for it.
Thy