Rick,
I don't shoot the P-3AT enough to wear out the slide but thought it was interesting that they don't recomend using a metal one in the P-32 but it is stock in the P-3AT. I compared the one from my P-32 and my P-3AT today and they are different lengths, so there is not an option.
By the way, Thanks for all the help you have given the members of this site. I know that you have answered a lot of questions I have had in the past. I noticed the number of posts you have made and I don't think I'm going to live long enough to make that many. Course mine would be questions and not answers like yours.