Operator's Manual

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49
CAUTION! USE CARE WHEN CLEANING THE TRIGGER
ASSEMBLY SO THAT THE SEAR PIN DOES NOT FALL OUT. DO
NOT REMOVE THE SEAR PIN, SEAR, SAFETY OR OTHER
TRIGGER PARTS FROM THEIR HOUSING. INCORRECT
REASSEMBLY CAN CAUSE A MALFUNCTIONING FIRE
CONTROL MECHANISM AND CAN LEAD TO AN UNSAFE
CONDITION. SERIOUS INJURY OR DEATH CAN OCCUR IF THE
TRIGGER MODULE IS NOT ASSEMBLED CORRECTLY. IF YOU
ARE IN DOUBT, CONTACT THE FN AMERICA PRODUCT
SERVICE FOR CORRECTIVE ACTION.
With the trigger assembly removed from the receiver, use an
all purpose brush and military-grade cleaner/lubricant to
remove debris and excess lubricant from the exterior of the
trigger assembly.
Compressed air or aerosol gun cleaners can be used to assist
in cleaning under the interior trigger components. Dry, clean
cloths should be used to wipe off any excess lubricants and
fouling. See Figure 80.
When clean, apply military-grade cleaner/lubricant to the
following parts. See Figure 81.
25.7 Bipod Assembly
With the bipod assembly removed from the receiver, use an all
purpose brush and military-grade cleaner/lubricant to remove
debris and excess lubricant from the exterior of the bipod.
Extend the legs and clean the telescoping parts with an all
purpose brush.
Compressed air or aerosol gun cleaners can be used to assist
in cleaning the bipod and their moving parts. Dry, clean cloths
should be used to wipe off any excess lubricants and debris.
See Figure 82.
When clean, apply military-grade cleaner/lubricant to the
following parts, including the hinged joint, telescoping legs
and the locking buttons. See Figure 83. Apply a thin film of
lubricant to all external metal parts.
25.8 Handguard, Heat Shield and Buttstock Assembly
grade cleaner/lubricant or bore solvent to clean the chamber.
Use clean bore patches with the cleaning rod and an eyelet to
swab the interior of the bore and chamber clean. Leave the
interior of the chamber and bore dry by swabbing it with a dry,
clean patch.
NOTICE! DO NOT USE A STAINLESS STEEL BORE BRUSH TO CLEAN
THE BORE OR CHAMBER. IT WILL DAMAGE THE CHROME PLATING.
Use the optional scraper tool to clean the gas block and gas
plug. See Figures 76 and 77. If this scraper is not available,
use universal scrapers or bronze bristled brushes to clean the
gas block and gas plug. Do not use abrasives.
When clean, apply military-grade cleaner/lubricant to the
locking lug areas of the barrel extension. Apply a thin film of
lubricant to all external metal parts. Do not lubricate the
chrome plated gas plug or the interior of the bore and
chamber.
25.5 Gas Cylinder
With the gas cylinder removed from the receiver, use an all
purpose brush and military-grade cleaner/lubricant to remove
debris and excess lubricant from the exterior of the
gas cylinder.
Use the optional scraper tool’s flat end to clean inside the
knurled end of the gas cylinder. Rotate the tool inside the
cylinder’s opening scraping the fouling loose from the interior
grooves. See Figures 78 and 79. If this scraper is not
available, use universal scrapers or bronze bristled brushes to
clean the gas cylinder. Do not use abrasives.
Use a cleaning rod with a 12 gauge bore brush and military-
grade cleaner/lubricant to scrub the interior of the gas
cylinder. Use a dry cleaning cloth to wipe the interior of the
cylinder dry.
When clean, apply a thin film of lubricant to all external metal
surfaces. Do not lubricate the interior of the gas cylinder.
25.6 Trigger Assembly
FIGURE 80
FIGURE 81
FIGURE 82
FIGURE 83
FIGURE 78
FIGURE 79
FIGURE 77
FIGURE 76