Top of the morning to everyone. I recently inherited an Enfield Rifle from my father. He said it is very special. I want to learn some more about it. I shot it and it is a tack driver. It has parker hale sights on it and I am not sure how to adjust them. It is a Long Branch #4 MK 1*. 1943 It has a third swivel by the trigger guard. Ya'll be easy on me I'm a woman with not much experience with guns other than loving target shooting.