Anything made for the python will fit. I am guessing that anything made for the s&w 586 should too. Years ago at work I had the offical police, 586 and ruger speed six all available to me. They were company guns all in 4". We were isued company holsters from several makers. One holster fit all three just fine. I also carried a colt trooper probley the most. I still have 3 or 4 of those holsters yet. I still have several troopers and pythons. I also have a holster or two for K frame smiths. They are a little too tight for my colts.