FYI, I purchased a Kimber .22 conversion for my two Sentry 1911's. On the .45 it would not go on completely, it was extremely tight on the frame. So I mounted it on my 9mm Sentry. It went on and was very smooth, but I couldn't get the frame pin thru. I called Kimber, and was told there was no guarantee of fit except on a Kimber. They would not let me return it. So I contacted Cabela's and they accepted my return.