I put an inquiry on the classified section and found out that there is much that I don't know about peep sights.
I would appreciate input from members here.
Mine is I believe about a 1945 vintage. ( 1,296xxx ) serial #
Were they factory drilled ? Hole spacing is 0,420 .
Is this a standard drill pattern ?
The good and bad about receiver sights to watch for when buying new or used.