Figure 86. Feeding—bolt fully forward, belt feed »lid* in the cover and airtmtnution belt held in the feedway by the belt holding pawl (rear view).
belt is pulled in by the belt feed pawl. The next round rides over the belt holding pawl, compressing its spring and forcing the pawl down until the round has passed over the pawl (fig 90).
(5) When the bolt is fully forward, the slide is back in the cover; the first round is engaged by the extractor.
(6) If for any reason a round is not extracted from the belt, the belt feed pawl arm will ride up over the round, holding up the belt feed pawl to prevent double-feeding.
b. Withdrawing a Round From the Belt.
(1) The extractor grips the first round in the feedway and, as the recoiling parts move to the ear, withdraws it from the ammunition belt. Initially, the grip of the extractor is held secure by the downward pressure of the cover extractor spring (fig 91).
(2) As the bolt continues its movement to the rear, the cover extractor cam forces the extractor down, causing the cartridge to enter the T-slot in the bolt (fig 92).
(3) As the bolt moves to the rear and the extractor is forced down, the extractor lug, riding along the top of the extractor switch, forces the rear end of the extractor switch downward. Near the end of the rearward movement, the extractor lug overrides the end of the switch and the switch snaps back up into position.
As the bolt moves forward, the round is held by the T-slot and the extractor assembly. The extractor stop pin (on the left side of the bolt) permits the extractor assembly to go down only far enough to aline the round with the chamber (fig
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