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SOUND SUPPRESSOR MODEL MK-9K
ROUTINE CLEANING
Our experience suggests that total disassembly for cleaning is not nec-
essary, and for this reason the inner core is sealed to maintain optimum
positioning of the parts. Field stripping and cleaning should be performed
every 2,000 rounds. Because of molten lead splattering from the heat gener-
ated by friction with cast bullets and bullet lubricants, ammunition loaded
with cast lead bullets should never be used.
After field stripping, some cleaning can be performed by immersing the
central core of the suppressor in a suitable solvent.
Cleaning of the central core is optional and consists primarily of flushing
out unburned or partially burned powder residues. There are no perfect sol-
vents for the carbon deposited on the internal parts by the burning of the
powder. We have found, however, that Varsol automotive parts cleaner or a
mixture of 3 parts mineral spirits and 1 part Type A Automatic Transmission
Fluid are among the better solvents for suppressor cleaning. We suggest
against the use of water-based solvents. Never use solvents containing
ammonia, which can damage aluminum parts. This includes Hoppe's, Sweets,
and "GI" bore cleaner. Never use water or water-based solvents, which
can damage aluminum. Ultrasonic cleaners have limited value, because
they require water-based solvents.
Always read the warning label on any cleaner or solvent, and
remember that virtually all solvents are inherently dangerous and po-
tentially toxic. Always use adequate ventilation and both skin and eye
protection when using organic solvents.
FIELD STRIPPING (Partial Disassembly)
Unscrew the front end cap, which is threaded into the central core of the
suppressor. This will release the outer tube, which is held in compression by
the front end cap and rear mount. A small neoprene "O" ring in a groove in the
rear mount provides a gas seal. Remove the outer tube.
Unscrew the rear mount from the central core. Do not attempt to disas-
semble the central core. At this point the suppressor can be cleaned by
immersion.
Although complete disassembly of the central core is theoretically pos-
sible, we feel that so doing is not necessary and is without merit.
We recommend against the use of any water based solvent or cleaning
materials.
CAUTION
P. 8
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