I agree with Hank - not Cartel. I've owned two Cartel sights trying to be cheap and both rattled loose and settings would move no matter what I did. I ended up spending the money for a Shibuya Ultima RC and never looked back. In my opinion, a sight is something worth spending a little more on to get something reliable. If you keep an eye out on the AT FITA classifieds, you may find a used Shibuya for a very good price.