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071-311-2129 (SL1) - Correct Malfunctions of an M203 Grenade Launcher

Standards: Corrected malfunctions of an M203 grenade launcher. Followed all safety precautions according to TM 9-1010-221-10.

Conditions: Given an M203 grenade launcher mounted on an M16-series
rifle and 40-mm ammunition. The grenade
launcher has failed to function or fire.

Standards:
Corrected malfunctions of an M203 grenade
launcher. Followed all safety precautions
according to TM 9-1010-221-10.

Performance Steps

1.   Keep the weapon pointed at the target and keep all
soldiers clear of the muzzle (at least
80 meters or 264 feet).

Note.  M203
malfunctions consist of hangfires and
misfires. A hangfire is a delay in the
propellant’s igniting. A misfire is a
failure to fire. Both are handled in
the same way because they are often
indistinguishable.

2.   Wait 30 seconds from the time of the failure to
fire, then open the breech.

3.   Remove the round from the breech.

a.
Release the barrel latch.

b.
Slide the barrel forward to
eject the round.

c.
Either catch the ejected
round or reduce the distance the round
falls by holding the weapon close to
the ground.

d.
If the round does not
eject, tap the casing with the rifle
cleaning rod.

e.
If the casing cannot be
removed, notify the NCOIC or unit
maintenance.

4.   Examine the primer to determine whether the round
or the firing mechanism is defective.

a.
If the primer is dented,
keep the damaged round separate from
other ammunition until it can be
disposed of properly.

b.
If the primer is not
dented, the firing mechanism is
faulty. Report it to the NCOIC or unit
maintenance.

Note. If the primer is not dented, the round may be reloaded
on an operational M203.

Evaluation Preparation: 

Setup: Provide all materials listed in the task conditions. Use
dummy ammunition for training.

Brief
Soldier: Tell the soldier he must assume
a firing position to apply any required
immediate action.

Performance
Measures

GO

NO GO

1.   Kept the weapon pointed at the target and kept all
troops clear of the muzzle (at least
80 meters or 264 feet).

—

—

2.   Waited 30 seconds from the time of the failure to
fire, then opened the breech.

—

—

3.   Removed the round from the breech.

—

—

a.
Released the barrel latch.

 

 

b.
Slid the barrel forward to
eject the round.

 

 

c.
Caught either the ejected
round or reduced the distance the
round fell by holding the weapon close
to the ground.

 

 

d.
If the round did not eject,
tapped the casing with the rifle
cleaning rod.

 

 

e.
If casing could not be
removed, notified the NCOIC or unit
maintenance.

 

 

4.   Examined the primer to determine whether the round
or the firing mechanism was defective.

—

—

a.
If the primer was dented,
kept the damaged round separate from
other ammunition until it could be
disposed of properly.

 

 

b.
If the primer was not
dented, reported the faulty firing
mechanism to the NCOIC or unit
maintenance.

 

 

Evaluation
Guidance: 
Score the soldier GO if all
performance measures are passed. Score the
soldier NO GO if any performance measure is
failed. If the soldier scores NO GO, show
him what was done wrong and how to do it
correctly.

References

 

Required

Related

 

 

FM
23-31

 

 

TM
9-1010-221-10

 


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