SIG SAUER SIG556 - Manual (Page 56)

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4.2.5 Full auto fire
The safety lever (6) is set on “A”. The automatic fire pawl (11) which supports
the sear (4) lies in the groove of the safety shaft (7). By pulling the trigger (8)
the sear (4) is drawn to the rear and supported by the automatic fire pawl (11).
The hammer (3) is released and strikes forward (refer to illu. 66).
The recoiling bolt cocks the hammer (3) which is retained by the auto sear (5)
(refer to illu. 67).
The advancing bolt presses on the release bar (2) which pushes the auto
sear (5) to the rear thus releasing the hammer (3) (refer to illu. 71).
This trigger function is only interrupted when the trigger (8) is released.
In doing so the link between the automatic fire pawl (11) and the sear (4) is
disconnected. The sear (4) moves downward and catches the hammer (3).
illUS. 73) trigger meCHaniSm
DUring FUll aUto Fire
illUS. 74) interrUption oF
FUlly aUtomatiC Fire
12SIG599_SIG556MiniManual1511980Rev02.indd 56 9/12/12 12:40 PM