I bought a ISSC M22 pistol while back and shot it last night and for some reason it will not fire every time I try and shoot it. It is a semi auto. So I can load it and pull the trigger and it will fire and cycle but then when I pull the trigger again it will not fire but if I cock the hammer back it will fire and cycle and it did this off and on. So I brought it home cleaned it good but it still does it. It may do it every other round or maybe every few shots. Not sure any suggestions? Thanks