Manual

SIG 556 Operators Manual 42 P/N 1511203 VER 12.7.2
TO REASSEMBLE
7.1. Reassembly
The rifle should always be reassembled in the reverse order of
disassembly:
1. Install the firing pin:
a. Insert the firing pin and firing spring spring into the bolt
head. The spring should be at the rear. Ensure that the
notch on the firing pin is aligned with the firing pin stud.
b. With one hand, place the bolt head (firing pin at the
bottom) on a flat surface and depress the firing pin until
the notch in the firing pin is aligned with the hole in the
bolt shaft for the firing pin stud.
c. With the other hand, insert the firing pin stud and
release tension on the firing pin. Ensure the firing pin stud
is centered.
2. Install the gas tube:
a. Slide the gas tube (notch down) through the gas block
and insert into the gas tube opening in the receiver.
b. Press the gas tube against the gas block (compressing
the stop pin) and rotate the gas tube to the right beyond
ninety degrees (90°) until the stop pin locks into the gas
tube notch.
3. Install the operating rod assembly:
a. Insert the operating rod assembly into the gas tube.
Ensure the end with the charging handle notch enters first,
notch facing down.
SIG556 OM 12.06.qxp 1/8/2007 2:26 PM Page 42