The PU mount on my MN rifle was loose. I discovered that the threads holding the PU side mount to the receiver have been stretched. To tighten side mount, I had to remove the locking screws and turn the main screws in more. Now the location cut in the head of screws for the locking screws is not longer correct. The threads are Whitworth (55 degrees) not metric (60 degrees). Please advise.
Okay. We may have some replacements available in our spare parts bin. There are several fasteners used in that mount so I need to be sure which one you are looking to replace. Can you please take a picture of the mount and the location of the fastener?