Quote Originally Posted by enbloc8 View Post
What's involved in removing this upper/lower receiver play? Vertical play on mine seems fine (new receiver and a good tight lock-up at the rear), but I can detect some sideways play at the pivot pin when the action is open. I've heard of putting a thin lock washer into the pivot pin assembly; is this effective? (Assuming that's even kosher for service rifle standards.)
You DONT want to tighten/squeeze the SIDES of the TMH at the axis screw holes. Because then you would bind/pinch the safety sear. This is an IMPORTANT Safety feature that prevents the Rifle from firing until it is safely locked & can handle the firing pressure from a 7.62mm Round (20 Tons + per square inch!)