FN-FAL Manual.pdf - Army Discount Shop

- As the piston (P} moves backwards, it contacts the slide (B)
(fig. 5), thrusting it to the rear.
- The p iston spring, which has been compressed by the rear
movement of the piston, relaxes and returns the piston to its
forward position.
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Fig. 5
2 . REAR MOVEMENT OF THE MECHANISM
a . Unlocking the breech
As the slide moves backwards, the romps of the slide (B 1)
engage the cams of the breech block (C 1) {fig. 6), raising the
rear end of the breech block and lifting it out of engagement
with jts locking shoulder (D) in the body (E) (fig. 1).
- The breech block is thus unlocked.
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Fig. 6
'
@
' •
@ E
b. Extraction
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Fig. 7
- The shoulders of the slide ( 82) engage those of the breech
block (C2) (fig. 8) and the slide ond breech block travel to
the rear together.
During this movement, the extractor dow withdraws the
spent case rearwards from the chamber, holding it in t he
breech block recess.
c. Ejection
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I
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Fig. 8
- When the breech block recess is a I most ci. t the some I eve I as
the rear face of the ejection opening, the spent case contacts
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