Good video sir. Periodic or rd count “all spring changes.” I have to check my notes but it could be as early, as 4,000 or 6,000-6500 rd +/-. The, not cycling fwd is, the recoil spring assembly rod is bent or the cam was inserted poorly, at one point. It raises the carrier & slides fwd awkwardly. That failure has happened to me too, in as early as -500 rd. They sent me, a new one.