Figure 33. Extracting.
Figur* 34. Ejecting th« round Mad cocking.
(fl Feeding. Feeding takes place when a round is forced into the path of the bolt. The top round is forced into the patch of the bolt by the magazine follower which is under pressure of the magazine spring (fig 35). After the last round has been fired, the bolt is held in the rearward position by the bolt lock.
(g) Chambering. Chambering occurs when a round is moved into the chamber. This takes place as the bolt goes forward under pressure of the expanding operating rod spring, stripping the top round from the magazine and driving it forward into the chamber (fig 361. Chambering is complete when the extractor snaps into the extracting groove on the cartridge and the ejector is compressed into the face of the bolt.
fhi Locking. Locking begins as the bolt roller engages the rear camming surface in the hump of the operating rod. It is completed when the locking lugs of the bolt are fully seated in the locking recesses of (he receiver (fig 37).
b, Automatic (Rifles Equipped tcith Selector
(1) When the selector is positioned with the face marked "A" to the rear (ear type projection up), the rifle is set for automatic fire. Turning the selector to automatic rotates the sear release in position to make contact with the sear.
(2) After the first round has been fired (and with the trigger held to the re ark the operating rod starts its rearward movement under pressure of the expanding gates. As it moves to the rear, the connector assembly moves rearward under pressure of the connector assembly spring. The movement of the connector assembly rotates the sear release on the selector shaft so that the flange on the sear release allows the sear to move forward into a position where it can engage the rear hammer hooks II, fig 38). Then, when the bolt drives the hammer to the rear, the sear engages the rear hammer hooks and holds the hammer in the cocked position.
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