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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