I called them about 2 weeks ago because my SCH was hanging up and holding the BCG out. You would have to nudge it to go back in. They wanted pictures of the charging handle just laying flat on a table, done. They then wanted pictures installed in the gun, done. Not sure what that was going to tell them but.... I even sent a video of it hanging up and then a video of a BCM handle working fine. Then they wrote back wanting to know my build info. Why they did not ask this to start with, I don't know. After I tell them it's in a billet upper, they try to tell me that they build for mil spec forged uppers and that's why I am having trouble but I could send it in with me shipping it in and they would look at . I think they were looking for a way out and now a billet upper was the reason. After a heated email back, they are now supposed to send me a label and check it out. I really don't know why they cant ask for this info from the start instead of dragging this out and blaming something they are assuming is out of "mil spec". I won't buy another thing from them and not all that impressed with the products I have or the CS.