i was also told there are 2 style of magizines out there, if yours says "25 rounds" by the caliiber on the botom then your good if it says just .22 lr then you have the first edition, not sure what the real difference I just know i asked if I should return all 5 of mine and they told me not to if I had the newer ones and all of mine are. sorry if this has already been posted elsewhere
mine is on its way back to S&W it blew the extractor off the bolt no one was hurt but put a quick dampner on my pratice as it cost me $50 for two people to go to the range!! we will see what they say when I get it back