Heckler&Koch MR762A1-LRP User Manual

Page 18

d. Insert the small tip of the disassembly tool into the spring loaded detent located in

the center of the rear pivot pin. While pushing on the disassembly tool, drift the pivot

pin from right to left until the pivot pin reaches its limit of lateral travel. The tip of the

pivot pin should be visible on the left hand side of the lower receiver (Fig. 52).

Fig. 51 – Closing Upper and Lower Receiver

e. Insert the small tip of the disassembly tool into the spring loaded detent located in the

center of the rear takedown pin. While pushing on the disassembly tool, drift the rear

takedown pin from right to left until the rear takedown pin reaches its limit of lateral

travel. The tip of the rear takedown pin should be visible on the left hand side of the

lower receiver.

Fig. 52 – Detail of the rear Takedown Pin showing spring loaded detent.

f. Install the disassembly tool into the storage channel located at the back of the

buttstock.

g. Mount the recoil pad onto the back of the buttstock with the recoil pad perpendicular

to the buttstock. Ensure that the recoil pad is flush with the buttstock and rotate the

recoil pad clockwise one quarter turn until the recoil pad engages the locking surfaces

located on both the top and bottom of the buttstock.

FUNCTION CHECK

WARNING: Always ensure the MR762A1 is unloaded prior to attempting to perform

a function check.

NOTE: The MR762A1’s selector lever can be placed on safe regardless of the

position of the hammer. Legacy AR15/M16 platforms and many of their large caliber

counterparts (7.62 x 51 mm/.308 caliber) require that the hammer be cocked prior to

attempting to place the firearm on “SAFE”.

FUNCTION CHECK PROCEDURE

1. Perform clearing procedure (see above) and ensure selector lever is set on “Safe”.

2. Place the muzzle in a safe direction and rack the bolt to the rear three or four

times in quick succession by using the charging handle. The bolt should not bind

when traveling back and forth in the receiver.

3. “SAFE”: Let the bolt go forward and completely go into battery. With an

unloaded MR762A1 and the muzzle in a safe direction, ensure the selector lever is

set on “Safe” and attempt to pull the trigger. The hammer must not fall.

4. “SEMI-AUTOMATIC”: Rotate the selector lever to “Semi-Automatic” (Single Shot)

and with an unloaded MR762A1 and the muzzle in a safe direction, attempt to

pull the trigger and hold to the rear. The hammer must fall.

5. While maintaining pressure on the trigger, rack the bolt and release. The hammer

should be held by the disconnector.

6. Release the trigger. The hammer should be caught by the sear as signified by a

metallic click. Release the trigger completely and re-engage the trigger. Hammer

must fall.

7. Insert an empty magazine into the magazine well and pull back on the charging

handle. The magazine follower should engage the bolt catch and lock the bolt to

the rear on an empty chamber.

8. Remove the magazine and allow the bolt to go into battery, either by depressing

the bolt catch or by pulling the charging handle slightly back towards the rear and

then releasing.

9. Ensure that the MR762A1 is unloaded, place the muzzle in a safe direction and

pull the trigger to ease the tension on the trigger spring.

10. Place the selector lever back on “Safe” and snap the dust cover into position over

the ejection port.