I just got a new M14 and it seems the safety is really hard to engage. at first i thought it wouldn't engage at all, but after pushing the safety switch against a table ledge with abit of force, it engaged. It disengages with much less force, but to engage it, i have to put something over it to increase the surface area or it hurts my fingers too much, and apply probably close to 20 lbs of force. Is this normal? any help on fixing this would be welcome. i was thinking of taking it to a gunsmith first anyways to check the headspacing before shooting it, so maybe they can fix it at the same time.