I called them and asked them the same thing. I also have a revision M weapon but they said there is no need. I have fired at least 600 rds through mine and still have not had a failure. I also asked them if revision M weapons were having the most striker issues (broken strikers). The mentioned that strikers were mainly breaking because of people doing trigger jobs on them. I really do not know how a trigger job would cause a striker to break (maybe someone can answer that). Yobos4vr, try contacting them and see what they tell you. Then post their response. I really would like to know if we should be getting the revision N updates since it is my one and only carry weapon (i have no back up at the moment).