Heckler&Koch MR556A1 User Manual

Page 20

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.