Here are a bunch of photos from a new tutorial I am trying to start that show me heat treating my AMD-65 build...
http://quarterbore.com/images/amdbuild6/
Note: After you hear each hole to bright red and hold the temp - Then QUENCH it in water... After this is done for each hole and the ejector... then clean the receiver around the holes and ejector and then heat them to a blue-green and allow the receiver to cool at ROOM TEMPERATURE!
After the receiver is cool, I used a little rubing alcohol to remove excess moisture to prevent rust.