Heckler&Koch MR762A1 User Manual

Page 8

SECTION 4 — SIGHTS, SIGHT ADjUSTMENT, AND AIMING

HK DIOPTER SIGHTS
MR762A1 rifles can accommodate a wide variety of optical and mechanical (iron) sights.

For models with HK Diopter rotary sight sets, the sights are installed on the MIL-STD-

1913 (Picatinny) rail with a Phillips #2 screwdriver or the HK sight tool (Fig. 5 & 6). Do not

over tighten the screws.

Fig. 5 – Front Diopter Sight Fig. 6 – Rear Diopter Sight

For optimal sight use and the longest sight radius, the front sight is installed on the

most forward portion of the MIL-STD-1913 rail and the rear sight is installed on the

most rearward portion of the MIL-STD-1913 rail (located on the upper receiver). Sight

adjustment is as follows:

1. Place target 100 meters (109.3 yards) downrange

2. Rotate rear drum until the 100 meter setting (“1”) is visible to the shooter

3. Utilizing the HK sight adjustment tool and the acronym LLC (Low Left Clockwise);

adjust the strike of the round until point of aim (POA) equals point of impact (POI).

Any corrections which may be required when sighting-in the weapon may only be

performed by adjusting the rear sight for elevation or windage. MR rifles are designed to

be sighted in at a range of 100 meters.

ELEvATION ADjUSTMENT
Insert elevation adjustment tool into the rear sight cylinder so that the wedges of the

tool engage in the two slots in the cylinder which contain the catch bolts. Press Phillips-

head screwdriver downward into the adjustment tool and hold firmly. Rotate rear sight

cylinder manually in the desired direction (Fig. 7). After correction withdraw Phillips-head

screwdriver and remove elevation adjustment tool. The catch bolts will then re-engage in

the slots. After performing the elevation adjustment set the desired aperture again.

NOTE: Elevation: One 1/4 click of the drum will move the strike of the road

approximately 1.5” (3.8cm) @ 100 meters. One 360 degree rotation of the drum will

move the strike of the road approximately 6” (15.2cm) @ 100 meters.

Fig. 7 – Rear Sight Adjustment

Fig. 8 – Clamping Screw Fig. 9 – Windage Adjustment

(to tighten turn clockwise)

WINDAGE ADjUSTMENT
Point of impact, left: Loosen clamping screw on top of sight base (Fig. 8). Turn adjusting

screw on the right side counterclockwise (Fig. 9) in accordance with the required

correction. Then retighten clamping screw. This will move the impact to the Right.

Point of impact, right: Loosen clamping screw (Fig. 8). Turn adjusting screw clockwise

(Fig. 9) until the required correction has been performed. Then retighten clamping screw.

This will move the impact to the Left.

NOTE: Windage: One 360 degree rotation of the windage screw will move the strike

of the road approximately 6” (15.2cm) @ 100 meters.

TROY ACCESSORY SIGHTS
Some MR762A1 rifles are supplied with Troy Industries Micro Folding Sights. Aiming and

sight picture are similar to using the HK diopter sights covered in the section above.

Fig. 10 – Installing front TROY sight Fig. 11 – Tightening front TROY sight

INSTALLING TROY ACCESSORY SIGHTS (FRONT)

1. Unscrew clamping assembly and place the sights at the desired location on the

Picatinny rail (Fig. 10.

2. Apply one drop of tread locking compound to the exposed threads of the clamping

screw. Replace the clamping plate and tighten the clamping screw while pushing

sight forward against the cross-slot (Fig. 11). To raise the sight, grasp and pull up

until the sights locks in the upright position. To fold the sight, depress the button on

the left side of the base and fold down (Fig. 12, Fig. 13).