Manual

SIG 556 Operators Manual 13 P/N 1511203 VER 12.7.2
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 utilize the gas
valve in Position 2 is an indication that the rifle requires cleaning.
CAUTION: In the case of a hot or heavily fouled weapon, use
a cartridge or auxiliary aid to prevent burns to your fingers.
CAUTION: Firing with the gas valve in Position 2 is an excep-
tion. As soon as normal function returns, the gas valve must be
returned to Position 1. Continued operation with the gas valve in
Position 2 will increase recoil and place unnecessary stress on the
rifle. The rifle should be cleaned as soon as conditions permit.
WARNING: Always ensure the weapon is unloaded and
clear of ammunition when manipulating the gas valve.
2.1.7. Butt Stock Operation
1. The butt stock provides for easy adjustment of length to
accommodate the individual shooter or for storage.
2. To adjust the length of the butt stock, depress the adjusting
latch and move the stock to the desired position. Ensure the stock
is fully locked in position before firing!
SIG556 OM 12.06.qxp 1/8/2007 2:25 PM Page 13