I noticed just the other day that the head of my guide rod was starting to wear a V into it from where it seats into the barrel underlug (I think it is called?). It was actually looking a bit thinner on that side. So paranoid me decided to call about it, fearing it may eventually slip and cause a malfunction. The guy was super nice on the phone listened patiently while I bumbled about explaining it and said "it shouldn't be an issue but we will send one out to give you peace of mind." I gotta tell ya, that made me a happy camper! So now I will probably put a couple mags through with the new one and then use the old one for the range until it falls apart. I will just use the new one to carry. I had to share though and rave about how easy it was to talk to a live human being and get a better then expected outcome. If you ever have to call them rest easy that it will be a good experience!