Greased the lugs. Saturated the bolt with oil. No improvement. Called ArmaLite, explained my problem to a tech., and was told that they would send out a new charging handle ASAP. Apparrantly they have some experience with this particular problem to diagnose it that quickly. I don't see how the handle could cause this, but I'm not the AR tech. Maybe someone here could enlighten me. I am very impressed with ArmaLite. How many companies can one call into anymore, get a real, knowledgeable person on the phone, and have parts shipped to fix the problem? I really like "Made in America"! Nice job ArmaLite.