Thank you... I know about all of those parts but Just in front of the top cover and it's hingepen... And to the right of where you would load the magazine.
There is a flat spot Just above the chamber . And on That flat part, there is a piece of metal that looks to have two rivets in it .. It's a black and white picture from an old book that shows it... I can't find a picture Anywhere on the internet of the same thing, also it's not there on mine.. I have the photos on my phone of it and I will upgrade soon And put the pictures up ...thanks again