A study of the functioning of the first Belgian model covers in general all details of operation of future models with minor exceptions which will be noted in the text. Mauser's original design was so fundamentally correct that it has never been possible to do more than modify it, and as in our own Springfield (which is a Mauser action), to improve, or more correctly, to refine it to a degree.
As the bolt lever (handle) is lifted to open the action, the cocking stud projecting into the groove in the tang of the receiver prevents the cocking-piece and the bolt plug behind it from turning with the bolt
The tooth on the cocking stud is thrust back by the cam recess on the bolt thereby drawing the striker back and partly compressing the mainspring. During this raising movement of the bolt lever, the lower end of the lever where it joins the bolt thrusts against an inclined plane cut on the rear face of the cylindrical bridge part of the receiver. This leverage forces the entire bolt assembly to move a short distance to the rear thereby loosening the empty case in the chamber to provide primary extraction (loosening the expanded case in the firing chamber).
After the bolt lever has been lifted its entire travel distance (through an angle of 90 degrees) it ends in a vertical position. The end of the cocking stud now rests in the notch in the rear of the bolt; while the locking lugs have turned out of their locking seats in the receiver and are in the travel grooves in the receiver, permitting the bolt to be drawn to the rear.
As the bolt is pulled back, the ejector springs into its groove. Since the extractor in the face of the bolt is drawing the empty cartridge case back with the bolt, the ejector strikes the opposite lower face of the cartridge case swinging it to the right and thereby freeing it from the grip of the extractor and hurling it out of the action.
The left bolt lug at this point comes in contact with the tooth on the bolt stop, halting the rearward motion of the bolt.
The magazine springs force the next cartridge in line up into the path of the bolt.
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