tomcatt51, I just got in some Colt 901 pins from Brownell's and after putting them in, the pin for the trigger seemed to be more sloppy. I took it out and measured it at 0.1530" x 1.000" and the original S&W pin that I had just taken out measured 0.155" x 0.900" The suggestion at the rimfirecentral forums was that Colt 901 trigger/hammer pins were longer and would address the "walking" possibility over the shorter 0.900" factory pins. I would LOVE to have had them 1.555" or even 1.556" and fit tight rather than be 0.002 smaller.

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Vern