Manual

1. Ensure that the notches in the gas rings of the piston are not aligned
(Figure 40).
2. Insert the gas piston into the gas block with the gas rings towards
the muzzle.
3. Install the gas regulator, using the small end of the charging handle to
push in on the gas regulator detent, and rotate counterclockwise to the
12 o’clock position (Figure 41).
21.2. ASSEMBLING THE MOVING PARTS ASSEMBLY
1. Insert the bolt into the front of the
bolt carrier, ensure that the
extractor is positioned on the right
side (Figure 42).
2. Insert the bolt cam pin, ensuring
the tab is horizontal (Figure 43,
page 45).
3. Insert firing pin from the rear.
4. Insert the firing pin retaining pin
until firmly seated. When firmly
seated the firing pin retaining pin
will not be completely flush with
the bolt carrier.
Notice! DO NOT USE EXTREME
FORCE ON THE FIRING
PIN RETAINING PIN, IT IS NOT
DESIGNED TO FIT FLUSH INTO
THE BOLT CARRIER. APPLYING
EXTREME FORCE TO THE
FIRING PIN RETAINING PIN
COULD RESULT IN PERMANENT DAMAGE.
21.3. INSTALLATION OF THE MOVING PARTS ASSEMBLY
1. Install the return spring assembly into the moving parts assembly.
Make certain that the narrow end of the guide rod retaining plate
is up.
2. Ensure the upper portion of the bolt carrier is aligned with the
bolt carrier guide rails inside the receiver frame and the bolt is
fully forward in the bolt carrier (Figure 44).
44 45
FIGURE 44
Install the bolt carrier into the receiver frame.
FIGURE 45
Insert the charging handle.
FIGURE 42
Insert the bolt into the carrier.
FIGURE 43
Insert the bolt cam pin through the slot and
into the bolt.
FIGURE 41
Install the gas regulator by turning
counterclockwise to the 12 o’clock position.
FIGURE 40
Ensure the gas rings are not aligned as shown
in the photo on the left.
Incorrect
Correct