I have ayugo sks, everytime I shoot it I have to beat the bolt back with a hammer to eject the spent round. I am HOPING all it is, is a worn out gas valve. But if in fact thats all it was wouldnt you still be able to pull the bolt back manly just as I can when I load a clip and jack a bunch of rounds throw is without firing? And it get really stuck I beat on it pretty hard to get it to open up. ANy help would be great. thanks alot