I have several rock islands takes anything I have loaded , shoots good , no complaints and watch for specials as they are best buy for the dollar I have seen in awhile . If it is polymer I have a pair of the 45gap model 37 , kind of like them , odd caliber out , only 10 rounds ,same grip size as the model 17 & 22 . More of a reloaders gun then most as it is not widely available in stores .