Heckler&Koch MR762A1 - Manual (Page 21)

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ASSEMBLY (HK MAGAZINE)
To assemble the magazine, use the reverse sequence used for disassembly. If magazine
was cleaned, ensure that it is properly lubricated prior to assembly. Attach the follower and
locking plate to the spring and slide the follower into the magazine housing (it will only
assemble in one direction, do not force it). Push the locking plate down into the housing
enough so that the floorplate can be slid back onto the magazine housing. Ensure that the
locking plate button is secure in the floorplate hole.
Check the function of the magazine by tapping it on your hand. Also check the function
of the follower, for free movement by depressing it with the cleaning rod. Lastly check the
secure attachment to and fit of the magazine in the rifle.
CAUTION: It is possible to improperly load the cartridges if the guide is not
positioned correctly, the rim of the cartridge could possibly get caught in the rear
groove. Constantly check spring tension in between stripper clips. Unload magazine if
in doubt. Replace the stripper clip guides regularly as they wear with use.
Using thumb pressure on the rear of the top cartridge, press down firmly until all ten
rounds are below the feed lips of the magazine. Remove the empty stripper clip while
holding the stripper clip guide in place. Repeat until the magazine is full. Remove stripper
clip guide and retain it for future use.
NOTE: Do not slam the magazine on a table or a fixed hard surface during filling or
damage to the feed lips may occur. Instead apply gradual pressure to accomplish this
task.
NOTE: Protect the magazines from drop-induced damage on hard surfaces (concrete,
metal, etc.). Many weapon stoppages begin in feed devices that are not properly
cared for or that are abused unnecessarily.
SECTION 8 — CLEANING & MAINTENANCE
CLEANING OF THE MR762A1
There are no special requirements, cleaners, or lubricants required for cleaning the
MR762A1. The standard HK cleaning kit that is used for all 7.62 mm HK rifles may be
used for this firearm. 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 a solvent is used for cleaning, ensure all residual solvent is removed after
cleaning, and 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 using the rifle in extreme cold weather, dry cleaning solvent may
be used to remove traces of heavy lubricants before applying LAW. The following
lubricants (or their commercial equivalents) can be used: TW25 B, Shooter Choice,
LSA, LAW, or OX24.
Use solvents as follows:
1. Place a few drops on a swab or rag.
2. Clean the firearm with these swabs and rags until they come out clean.
3. Thoroughly purge all surfaces when solvents were applied.
4. Lubricate well in accordance with manufacturers’ recommendations.
CAUTION: Don’t “dry clean” your firearm.
General Cleaning is required under normal conditions and the following procedures apply.
1. Always clean after firing, after the firearm is wet or in adverse weather conditions.
Remove areas of powder fouling, debris and grit, corrosion and dirt. Clean the
bore with a bore brush and a cable cleaning rod. Pull the brush from the chamber
to the muzzle. Complete this several times with bore cleaner and let soak several
minutes if time permits. Clean the chamber with the chamber brush and a solid
cleaning rod handle. Rotate the chamber brush with bore cleaner by pushing and
twisting and also let it soak for several minutes while the upper receiver, piston,
piston rod and bolt carrier assembly are cleaned with the all purpose brush using
bore cleaner. Wipe excess cleaner off with a rag and then run several patches
through the bore with the cable rod from the chamber to the muzzle until there is
no residue on the patch.
2. Use an all purpose nylon brush or swab and apply a light coat of lubrication with
a clean swab to all the metal surfaces, including the bore, the locking lugs in the
chamber and on the bolt. A drop of oil should be placed on the ejector, extractor,
cam pin, trigger pin, hammer pin, charging handle spring and forward assist.
3. If the firearm has been disassembled, then all parts should be thoroughly cleaned
and lubricated before assembly. This is the best time to inspect all the parts before
assembly.