Here is an old shot of my M-66-3. My wife bought it for me when they reintroduced the 3" barrel on the Model 66.
I have shot it enough to have
Mulkerin of SDM tighten it up and bead blast it and do a few other minor things to it.
This has been my IDPA SSR gun. I carried it for years before switching over to my bottom fed 1911.