Read the above and then add .............getting their fucking 4 screws out on top of the receiver. Sorry but that is just how i feel after all of them, not 1, but 4 just turn in circles and will not come out. I just about lost my mind and took it outside to beat it against a tree. What is up with this? I suggest they keep the 4 little pussy screws out of the receiver so that nobody else has to go through something like that wanting to put a pic rail on.