Heckler&Koch MR556A1 - Manual (Page 20)

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MAGAZINE DISASSEMBLY
CAUTION: Parts are under considerable spring pressure. Wear safety goggles and
point the base of the magazine housing in a safe direction when disassembling or
assembling. Read the complete procedure before attempting to disassemble the
magazine.
To disassemble the magazine for cleaning or inspection, push in the locking plate (located
behind the magazine floorplate) with a cleaning rod, cartridge, or similarly shaped
object. As you depress the locking plate through the window of the floorplate, pull
back towards the rubber bumper so the locking tab will exit the locking window of the
housing. When the locking tab lifts up, the floor plate, locking plate, spring, and follower
will come out under pressure from the housing (Fig. 67). The floorplate is easily removed
from the locking plate, which is attached to the spring and follower. Take note as to the
arrangement of these parts for assembly. For cleaning purposes, it is not necessary to
disassemble the follower and locking plate from the spring (Fig. 68).
Fig. 67 – Magazine Disassembly (HK 30-Round Steel Magazine)
Fig. 68 – HK 30-Round Steel Magazine Components
ASSEMBLY (HK 30-ROUND STEEL 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 you can place the floor plate tab into the recess, (using the side with the
rubber bumper first). Let go of the locking plate and insert a cleaning rod or similarly
shaped object into the window of the floorplate and depress the locking plate while
applying pressure rearward against the rubber bumper so the locking tab will enter the
recess (locking window) in the front of the magazine (Fig. 68).
Once the floorplate is assembled, make sure the locking plate is seated flush against the
floor plate. 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.
Speed loader
Heckler & Koch does not warrant the use of alternate filling devices. Care should be taken
when using non-approved devices in that damage may occur to the magazine that is not
covered under warranty.
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.