Seen your question and from what I understand the answer favors a yes.
However, looking for answers for my own questions I ran across the following below which mentions extractor~s.
You may want to search the link supplied below for your specific question.
Safe Shooting
I had FTE issues till I changed his Extractor out with an DPMS made Extractor & had no issues after that . Thinking it could be just a Bad Extractor , I used another one from this same manufacturer , it was supposed to be better or a newer gen. , but it had the same issues as the original , so I put the DPMS one back in & all issues with FTE went away .