I have a Kimber conversion that works on my Colts and worked on a S&W 1911 I used to have. If I had it to do over, I would spend the extra bucks and buy a complete Kimber 1911 - .22
Marvels are the best, then kimbers, then advantage arms tied with cieners, and then the colt conversion.
They are more collectors items than current .22 top-end trainers