PK Series Manual (English, 2005) - Forgotten Weapons

Adjusting the Weapon’s Zero. When the shot group is satisfactory and the CS deviates
from the CP more than 5 cm, the sights are changed in accordance with the format
below:
Elevation –
If the CS is lower than the CP (point of aim), rotate the front sight post down
(clockwise).
If the CS is higher than the CP (point of aim), rotate the front sight post up
(clockwise).
Windage –
If the CS deviates to the right of the CP (point of aim, drift the blade base (front
sight) to the right.
If the CS deviates to the left of the point of aim, drift the blade base (front sight)
to the left.
How much the blade base is moved (i.e., raised or lowered) depends on how much the
CS deviates and the length of the aiming line as shown in tables 2 and 3.
CS deviation
(cm)
Blade moved
horizontally
(mm)
Table 1. Windage-Zero Adjustments
5 7.5 10 12.5 15 17.5 20 22 25 27.5 30
.33
.5
.66
.88
1
1.17
1.33
1.5
1.66
1.83
Table 2. Elevation-Zero Adjustments
Rotation of blade (full circle) 1/4 ½ 3/4 1
Vertical deviation of CS (cm) 3 6 9 12
The operator adjusts the blade base or the elevation under the supervision of his
supervisor. Move the blade base sidewise until it is aligned with the external surface of
the front sight base.
After the blade base is moved or its elevation adjusted by means of rotation, re-fire the
semi-automatic fire and automatic fire zero as outlined above. If this proves inadequate,
make further correction, and repeat firing.
If owing to a significant deviation of the CS, the blade base needs to be moved to the
right (or left) more than allowed, another marksman carries out the firing. If the results
are the same, the testing is discontinued and the machinegun is sent in for repair as
inaccurate.
If results are achieved with the semi-automatic fire zero, but the CS continues to be
more than 5 cm away from the CP, the proper functioning of the machinegun must be
UNCLASSIFIED
III - 15
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