Not competition ready but usable - Ranch Products S&W 929 9MM 8-Round Full Moon Clip, Pack of 8

These are thin sheet metal, so they flex too much to allow for quick reloads - the rounds simply "jiggle" too much. However, they work just fine if reload speed isn't a huge deal. I use them for Steels Challenge matches with the S&W PC 929. Because of the hexagonal cut, the TK Custom moon clip loader requires a bit of fiddling to make it work. So I recommend a couple of sets of these for practice and Steels Challenge matches, then some TK Custom clips for USPSA or other higher round count competitions.