making sure the larger holes on the end of the two
pieces are in alignment.
12. Remove the piston by pulling it rearward out of the gas
cylinder. The gas cylinder can now be examined for
accumulations of residue. Residues in the gas cylinder
and on the gas piston should be thoroughly removed
with a good quality powder solvent or bore cleaner. If
residues are heavy, remove them by scrubbing the gas
cylinder with a 20 gauge shotgun bronze wire bore
brush and a good powder solvent.
13. The gas piston, gas cylinder, and other parts covered by
the forearm should be wiped with a lightly oiled cloth
after cleaning. The gas cylinder interior and the gas
piston should not be oiled beyond this.
REASSEMBLY
1. Replace the piston back into the gas cylinder.
2. Slide the action spring over the action spring guide
and insert the action spring/action spring guide
assembly into the larger hole in the inertia block.
NOTE: The rounded end of the action spring guide
is inserted into the gas piston. The opposite end is
flat, with a hole. This end fits to the receiver, with
the roll pin passing through the hole in the action
spring guide.
3. Position the action spring/guide/inertia block assembly
underneath the barrel. Slide the rounded end of the
action spring guide into the piston while compressing
17
Remove the bolt lock pin (Figure 16) and pull the bolt
lock forward and out of the receiver. You can then
pull the forward end of the right action bar away from
the inertia block, and lower and pull the action bar
out of the receiver.
7. With a small punch, gently tap out the roll pin
located just forward of the bolt lock pin. NOTICE:
The roll pin must be tapped out from the left to the
right side.
8. Grasp the action spring securely and compress it
forward enough to expose the action spring guide.
9. While maintaining tension on the action spring, slide
the action spring guide forward slightly and remove
the recoil buffer assembly.
10. Continue to maintain tension on the action spring
and slide the action spring guide fully rearward. The
action spring and action spring guide assembly can
now be removed, along with the inertia block and gas
piston, by pulling the action spring down and away
from the barrel (Figure 17). Remove the assembly
slowly as the action spring is under tension and care
should be used to avoid injury and lost mechanical
parts. NOTE: The gas piston must be inside the gas
cylinder in order to remove the action spring guide.
11. The inertia block can then be disassembled for
cleaning by lifting the center block out of the frame
(Figure 18). After cleaning, reassemble the inertia
block by replacing the center section inside the frame,
16
FIGURE 18
The two pieces of the inertia block
can be separated for cleaning.
FIGURE 16
Remove the bolt lock pin.
Tap out the roll pin from left to
the right side.
FIGURE 17
Remove the action spring, action spring guide and
inertia block assembly.
Recoil Buffer Assembly
FIGURE 15
Carefully remove the bolt lock
spring with a screwdriver.
