I just picked up a no 4 mk 1 and it has the flip sights and I learned on google that one is for 300 yards and one is 600 yards, but I can tell which is which, can someone help me? I only plan on shooting/hunting with thing between 0-150 yards with this rifle, is there a place to buy new sights? can I drill a second hole one of the hinged sight "tabs" to drop the poi a bit?




















































