SIG SAUER SIG 551-A1 Rifle User Manual
Page 55
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55
When the third round is fired – just like the second round – via the release bar, the segment (10), pressed by the
chargeover (14) jumps on the driving cam (12) of the trigger (8) and interrupts the support of the sear (4) by the
automatic fire pawl (11).
The auto sear (5) catches the hammer (3) (refer to illus. 67).
The advancing bolt drives the release bar (2) downward. The release bar (2) presses the auto sear (5) to the rear and
releases the hammer (3) (refer to illus. 71).
The hammer is retained by the sear. When the trigger (8) is released the segment (10) moves back to its home position
(refer to illus. 68).
illuS. 72) trigger meCHaniSm
aFter tHe tHirD rounD
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