You ask good questions. The ejector is spring loaded to be held to the rear, flush with the bolt face. When the the bolt is pulled all the way to the rear the bolt stop contacts the ejector pushing it forward ejecting the cartridge. This gives the operator control over the ejection force, "controlled ejection". I am not aware of any other design that does it this way. The locking lugs pivot at the front end and when retracted are flush with the outer surface of the bolt.