Operator's Manual

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Hook the front end of the forearm behind the round bosses on
the receiver and rotate the forearm up and onto the receiver.
See Figure 85.
Once against the receiver,
slide the forearm to the rear.
Using a cleaning rod or the
guide rod to press the
retaining pin from left to
right, securing the forearm to
the receiver. See Figure 86.
2. Install Bipod
To install the bipod, ensure it
is open. Place the bipod yoke
over the front receiver boss.
See Figure 87.
3. Install Gas Cylinder
With the bipod in place,
insert the gas cylinder into
the opening in the front of the
receiver. The lead end of the
gas cylinder is shown in
Figure 88. Note the spring
detent on this end of the
cylinder.
Center the lead end of the
gas cylinder in the opening
below the barrel block. A
detent/locking spring will
need to be pushed out of the
way by the gas cylinder. See
Figure 89. The guide rod can
be used to push the gas
cylinder against the detent
spring so the gas cylinder
can drop into the opening in the barrel block. See Figure 90.
Once the gas cylinder is started into the barrel block, press in
on the gas cylinder while turning the gas cylinder until it
drops further into place.
Continue to rotate the gas cylinder until the detent spring
locks the gas cylinder.
4. Install Barrel Assembly
Install Heat Shield
Before installing the barrel, first install the heat shield to
the barrel.
Hook the front of the heat shield under the barrel cross pin
and rotate the heat shield down and onto the barrel. The heat
shield clips will snap into place, securing the heat shield to
the barrel. See Figure 91.
Install the Barrel Assembly
Align the barrel extension with the opening in the barrel block
on the middle of the receiver, just forward of the barrel latch
lever. At the same time, align the gas plug to the open end of
the gas cylinder. See Figure 92.
Press back on the barrel latch lever and install the barrel into
receiver. Ensure the barrel is locked into place.
5. Install Moving Parts Assembly
Reassembly Moving Parts Assembly
Assemble the bolt assembly by first placing the firing pin
spring over the firing pin. Insert the firing pin and spring into
the end of the bolt. Insert the firing pin retaining pin into the
cross hole at the rear of the bolt so that it passes through the
slot in the firing pin. See Figure 93.
Install the assembled bolt into the bolt carrier by inserting the
tail of the bolt into the carrier. Rotate the bolt so the cam lug
clears the bolt carrier then falls into the cam slot. Move the
bolt to its forward position on the carrier. See Figure 94.
FIGURE 86
FIGURE 85
FIGURE 88
FIGURE 89
FIGURE 93
FIGURE 94
FIGURE 90
FIGURE 87
FIGURE 91
FIGURE 92