SIG SAUER P556 - Manual (Page 13)

P556 Pistol Operators Manual
13
1511582 VER 08.01.08
The trigger guard may be released from its normal position to
make the trigger accessible for shooting with gloves. For safety
reasons the trigger guard must not be released until just before
firing the weapon, and after firing should be immediately returned
to the normal (closed) position.
CAUTION
: Be careful of accidental discharges when inserting
gloved fingers into the trigger guard.
2.1.6. Gas Valve Position
The gas volume required for the function of the P556 pistol 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).
When cycling or ejection problems are encountered due to heavy
fouling, the gas valve can be moved to Position 2 by rotating
clockwise as far as the stop. In this position, a larger gas volume
is released against the operating rod. The need to use the gas
valve in Position 2 is an indication that the pistol requires
cleaning.