So ironically enough, I recently purchased a few LRH Green Mountain barrels used and after reading about inserts and thread repair on barrels, green mountains barrel recalls came up. One of the barrels I just purchased falls into the recall. I called them to verify, they want me to send the barrel in so they can repair it with an insert of some kind. It must be a safe way to make a repair if GM is doing it with a sizable amount of barrels.