I am trying to decide on buying either a Smith and Wesson M&P 15-22 or one of those Pietta's PPS-50 so any input would be appreciated. I have heard that quite a few years ago the 22 version of a PPSH had quite a few problems ranging from the magazine to the sear. For appearance and convenience of shooting with friends and the farm, I am partial to the PPS-50 but for past problems of it I am thinking of the 15-22. Unfortunately since the 15-22 is restricted I can only take it to the range. Does anyone know if there are problems with either the PPS-50 or the M&P 15-22? Any other comments?