Heckler&Koch MR762A1-LRP User Manual

Page 22

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. 62 – 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.

Inspection
A visual inspection is recommended each and every time you clean a magazine, the

magazine is disassembled, or a problem exists that could be magazine related. The

following are guidelines that can help in identifying and solving magazine related

problems.

Many problems are very often related to incorrect operator use or maintenance, faulty

ammunition and/or problems in the weapon. These areas should be checked for problems

at the same time the magazine is inspected. If the same problem exists with more than

one magazine, then more than likely it is a rifle, operator, or ammunition problem. When

problems do occur, mark/identify the suspect magazine with a tag or paint/grease pen and

use the following as a guideline. Check for proper assembly. Inspect overall function of

follower (free movement), locking tabs, dents, cracks, etc.

1. Housing: Inspect feed lips for dents and proper spacing, sides for dents, magazine

catch area for worn surfaces or dents, cracks, etc.

2. Follower: Inspect for free movement inside of housing, dents, cracks and deformities.

3. Spring: Inspect for bends, cracks, weak tension.

4. Locking Plate: Inspect for worn or broken tabs. It should retain floor plate and stay

securely attached to the spring.

5. Floor plate: Inspect for bends, cracks and correct fit of the locking tabs into the

locking recess of housing.

6. Rubber bumper: Insure bumper retains floor plate into housing when assembled and

there are no signs of extreme wear.

If any problems are identified, repair or replace as necessary.