Actually, he did not say anything about the plunger tube. He was very frank as he took the pistol apart, and said he would let me know if there was anything that was a "Must Replace" item as he worked on it. Based on that, I have to assume the plunger tube was okay. I went back through our emails, and tried to remember the conversation, and the ejector was the only thing he really did not like. He "miked" and measured several items while I was there and his comments were, "These are all well within specifications.".