This view shows clearly the cam shape of the receiver bridge against which the side of the bolt handle operates in this design to provide the initial camming action. As the bolt handle is lifted, it must follow the curve in the bridge, and thereby act to withdraw the head of the bolt and provide tremendous primary extraction to start the swollen cartridge case out of the chamber. This extraction is much more powerful than in any other design of rifle. Upward movement of the handle also provides the camming action to force the cocking-piece back far enough to withdraw the striker from the head of the cartridge case. When the bolt is in 90 degree upward position, that is vertical, the lugs are out of their recesses and in their travel tracks where the bolt can be drawn straight to the rear for extraction and ejection.
These principles are the ones still in general use in all bolt action rifles of modern design.
The bottom of this magazine is closed by a plate. The magazine spring is of ribbon steel bent into zig-zag form and has its ends secured in an undercut recess in the plate and in the platform (or follower). A rib on the platform at its left side raises the column of cartridges resting upon it, thereby bringing the center of the cartridges in the left column level with the tops of the corresponding cartridges in the opposite column.
When the last cartridge has been fired, as the bolt is pushed forward its face is caught by the rear end of the rib of the magazine follower, preventing it from being closed until the magazine is re-
Model 1S90 Turkish
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