rick: you may want to see if S&W has one of the 're-contoured' cylinder release. I have one of those on one of my 38s and they are nice to shoot with as they don't get in the way of your thumb. I once ordered some aftermarket cylinder releases that were contoured the way the new factory parts are but it was way to large and cumbersome. I went to S&W. But, this is just my 2 cents worth. Mikey.