Hope you have all the spare parts you anticipate needing… forever… for the Smith & Wesson 3rd generation guns, according to what folks are writing over at AR15.com and the Smith & Wesson Forum: As a regular over at the S&W Forums I came across this https://smith-wessonforum.com/smith-wesson-semi-auto-pistols/377999-3rd-gen-parts-im-afraid-were-our-own-gents.html And confirmed it by calling S&W directly. They are ceasing …