Heckler&Koch MR762A1 - Manual (Page 23)

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Fig. 73 – MR762A1 Buttstock Assembly
Fig. 74– MR762A1 Lubricant Guide
LUBRICATION SUMMARY
NO Lubrication: (surface is dry and not slippery to the touch)
• Plastic or rubber components
• Sling webbing
• Optics
LUBRICATION
• Gas Piston and Gas Cylinder,
• Buffer and recoil spring
• Bolt, Bolt carrier, Cam pin and Firing Pin Safety
• Extractor
• Ejector
• Barrel extension
• Bore, chamber, locking surfaces of the chamber and bolt lugs
• Receiver take down and pivot pin
• Hammer, trigger, disconnector springs and selector lever in trigger group
• Piston rod
• All metal parts and/or any area where metal contacts metal.
Magazine Cleaning
There are no special requirements, cleaners, or lubricants for cleaning MR762A1
magazines. The standard cleaning equipment that is used for the rifle may be used for
these magazines. Refer to the care and cleaning section of this operator’s manual for more
detailed information. Do not use metal bristle (brass or steel) or wire brushes to clean the
magazine components as scratches or other damage may occur to the protective qualities
of the surface finish.
Cleaning may be completed using dry cleaning solvent, bore cleaner, wiping with a
cloth or an all purpose nylon brush. Using these guidelines will determine which applies.
Cleaning materials are pipe cleaners, swabs, all purpose nylon brush and rags.
NOTE: If cleaning is completed using a solvent, then a coat of lubricant must be
applied for protection against rust and the elements. Dry cleaning solvent may be
used to completely remove lubricants. For example, when moving to extreme cold
weather operations, dry cleaning solvent may be used to remove traces of standard
lubricants before applying a cold weather lubricant like “LAW.”
A variety of high quality lubricants, including some generic “cleaner, lubricant, and
preservative” solutions, LSA (Lubricant, Small Arms) or LAW (Lubricant, Arctic Weather) —
and their commercial equivalents and can be used on HK MR762A1 magazines.
CAUTION: Don’t “dry clean” your magazines. Do not use hot water or other solvents
or you could inadvertently wash away Teflon lubricant that has been building up as
a result of your using some cleaning, lubricant, and preservative solutions. Rifle Bore
Cleaner (RBC) may be used on HK magazines to remove carbon.
Fig. 75 – MR762A1 Magazine
General cleaning is required under normal conditions and the following procedures apply:
1. Always clean after firing, after magazine is wet or in adverse weather conditions.
Remove areas of powder fouling, debris and grit, corrosion and dirt.
2. If magazine is assembled, clean carbon off of follower and feed lips with the all
purpose nylon brush or swab and apply a light coat of lubrication with a clean swab.
If the magazine has been disassembled, then all parts should be thoroughly cleaned
and lubricated before assembly.
NOTE: Do not mix lubricants on the same magazine. The magazine must be thoroughly
cleaned during the change from one lubricant to another. Dry cleaning solvent is
recommended for cleaning during the change from one lubricant to another.
Lube guide
Under all but the coldest Arctic conditions, normal high quality lubricants can be used on
your magazine. Between +10 degrees F (-12°C) and -10 degrees F (-23°C) either normal
high quality lubricants or LAW may be used. Below -10 degrees F (-23°C) use LAW.