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Performance Steps
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Note. This task may be performed using either of two sights
found on the system.
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WARNING:
Keep muzzle
pointed downrange and clear of all
friendly troops.
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1. Keep the safety in the SAFE position until ready to
fire.
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2. Load the M203 grenade launcher (Task 071-311-2127).
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WARNING:
Fire
high-explosive (HE) grenades at
targets within 130 meters (427 feet)
(minimum safe) only from a protected
position. When training (minimum
safe), do not fire at targets within
130 meters (427 feet). In combat, do
not fire at targets closer than 31
meters (102 feet).
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3.
Determine range to target
(figure 071-311-2130-1).
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Figure 071-311-2130-1.
Range estimation
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4. Determine if target is engageable.
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5. Determine if target should be engaged.
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6. Select the appropriate firing technique based on
target range (figure 071-311-2130-2).
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Figure 071-311-2130-2.
Firing techniques
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a.
For short-range targets at
50 meters or less, place the leaf
sight down and use the rifle sights
(A, figure 071-311-2130-2).
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Note. Estimate distance to target and aim head high on the
target.
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b.
For targets from 50 to 250
meters, raise the leaf sight and use
with the rifle front sight (B, figure 071-311-2130-2).
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c.
For targets from 250 to 400
meters, use the front and rear sight
of the quadrant sight only (C, figure 071-311-2130-2).
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7. Select and assume an appropriate firing position
(figure 071-311-2130-3).
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Figure 071-311-2130-3.
Firing positions
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Note. Launcher may be fired from the standing, kneeling, or
prone position.
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a.
Place the stock of the
weapon on the ground when firing long
range from the prone position.
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b.
Hold the stock firmly
against your shoulder for all other
positions.
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8. Obtain sight picture (using leaf sight or quadrant
sight).
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Note. Leaf sight may be used at ranges between 50 and 250
meters.
Quadrant sight ranges are from
50 to 400 meters.
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9. Adjust the leaf sight if necessary (figure 071-311-2130-4).
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Figure 071-311-2130-4.
Leaf sight
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Notes.
1.
For range, the leaf sight scale is
marked in 50-meter (165-foot)
increments for targets from 50 to 250
meters.
2.
For elevation, one increment equals 10
meters (33 feet) at a 200-meter
(660-foot) range.
3.
For windage, one increment equals 1.5
meters (5 feet) at a 200-meter
(660-foot) range.
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a.
For headwind and rear
wind-
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(1)
Loosen the elevation
adjustment screw to move the leaf
sight up to increase range for head
wind.
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(2)
Lower it to decrease range
for rear wind.
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(3)
Use the rim of a used 40-mm
cartridge to turn the elevation
adjustment screw.
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b.
For left wind and right
wind-
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(1)
Turn the windage adjustment
screw clockwise to adjust for wind
from the left.
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(2)
Turn the windage adjustment
screw counterclockwise to adjust for
wind from the right.
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10. Adjust the quadrant sight if necessary (figure 071-311-2130-5).
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Figure 071-311-2130-5.
Quadrant sight
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Note. Range quadrant is marked in 25-meter (83-foot)
increments from 50 to 400 meters (165
to 1,320 feet).
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a.
Pull the latch toward you
to release the quadrant sight arm.
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b.
Select elevation.
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Note. For
elevation adjustment, one notch equals
5 meters (17 feet) at a 200-meter
(660-foot) range.
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c.
For head wind and rear
wind-
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(1)
Turn the front sight post
left to increase range for head wind.
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(2)
Turn the front sight post
right to decrease range for
rear wind.
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d.
For left wind and right
wind:
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(1)
Depress the retainer and
slide the rear aperture in to adjust
for wind from the right.
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(2)
Slide the rear aperture out
to adjust for wind from the left.
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Note. The vertical line marks the center. One notch equals 1.5
meters (5 feet) at a 200-meter
(660-foot) range.
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11. Move safety to the FIRE position.
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WARNING:
Be sure there
are no obstacles (such as the sling
or branches) in the line of fire.
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12. Aim and squeeze the trigger to fire.
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Note. Practice
breath control when firing the rifle.
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13. If the first round misses, adjust fire as necessary by sensing
the impact of the round and
manipulating the sight.
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Note. Continue
the adjustment process until a hit is
obtained or the area has been covered
by fire.
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a.
If time allows, whether
using the AN/PVS-4 or AN/PVS-7, adjust
the sights, but if time is critical,
adjust the point of aim instead.
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b.
If the grenade lands more
than 25 meters over or short of the
target, adjust the range quadrant to
bring the next grenade on target.
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c.
If the grenade explodes
less than 25 meters from the target,
adjust the point of aim to bring the
next grenade on target.
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d.
If the launcher is properly
zeroed, deviation errors will be small
and you can easily correct them by
adjusting the aiming point. Adjust for
wind as described in steps 9 and 10.
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