SIG SAUER SIG556 - Manual (Page 21)

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2.1.6 Gas Valve Position
The gas volume required for the function of the SIG556 ® rifle can be controlled by the gas valve. The gas valve has two
positions:
a. Position 1 (Rib of gas valve in vertical position).
Under normal conditions, the gas valve should remain in Position 1. This will give the best all-around performance and
function.
b. Position 2 (Rib of gas valve in the slanted position).
poS 1 - riB VertiCal poS 2 - riB SlanteD
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