Operator's Manual
40
41
2. Before disassembling the FN
M249S
™
, make sure the
slide hammer is cocked and
the safety selector is in the
SAFE position as explained
in Sections 10 and 11, the
rifle is cleared as described
in Section 17 and the
muzzle is pointed in a safe
direction.
3. Open the feed tray cover by squeezing in on the cover latches
on the rear of the feed tray cover. See Figure 52. Leave the feed
tray cover open in the 90
o
position.
4. Pull the charging handle to the rear and place the safety
selector in the FIRE position. While holding the charging
handle, repeatedly pull the trigger and slowly let the charging
handle move forward until the bolt carrier and slide hammer
move forward and can be closed fully forward. The slide
hammer must be released by the sear and be in the
forward position.
WARNING! FAILURE TO PLACE THE BOLT CARRIER ASSEMBLY
AND SLIDE HAMMER IN THE FORWARD, FIRED POSITION
WILL RESULT IN A DANGEROUSLY HIGH AMOUNT OF SPRING
TENSION ON THE GUIDE ROD. SERIOUS BODILY INJURY MAY
RESULT. DO NOT ATTEMPT TO REMOVE THE BUTTSTOCK
ASSEMBLY OR GUIDE ROD ASSEMBLY WITHOUT ENSURING
THE BOLT CARRIER AND SLIDE HAMMER ARE
FULLY FORWARD.
5. Rotate the buttstock open
Rotate the buttstock open by first pulling the upper take down
pin to the left. It is a captive pin and will not come completely
out of the receiver. Once withdrawn, rotate the buttstock
assembly down and out of the way of the rear of the receiver.
See Figure 53.
Withdrawing the take down pins is made easier by first
pressing in on the retention springs on the right end of each of
the pins as the pins are removed as shown in Figure 54.
6. Remove Drive Springs and Guide Rod
With the buttstock opened and rotated out of the way as
described above, press in and up on the exposed drive rod and
1. FN M249S
™
Subassemblies
Identification
1. Barrel Assembly
2. Buttstock Assembly
3. Guide Rod
4. Bolt Carrier / Piston Assembly
5. Bolt
6. Slide Hammer
7. Drive Spring
8. Trigger Assembly
9. Gas Cylinder
10. Bipod Assembly
11. Receiver Assembly
12. Forearm
13. Heatshield
14. Slide Hammer Spring
FIGURE 52
FIGURE 54
FIGURE 53