Warning

Clear the weapon before starting an inspection.

1. FAILURE TO FIRE.

Step 1. Check for dirt in firing pin recess (1).

Clean firing pin recess with CLP (item 5, app D) or RBC (item 7, app D) (see TM 9-1010-221-10).

M203 Nomenclature

Troubleshooting Procedures Page

ARMY TM 9-1010-221-23&P AIR FORCE TO 11W3-9-4-2 MARINE CORPS TM 07700A-23&P/2 NAVY SW 370-AE-MMI-010

2-9. TROUBLESHOOTING PROCEDURES (CONT).

UNIT TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 2. Check for dirt in cartridge locator slot (2).

Clean cartridge locator slot with CLP (item 5, app D) or RBC (item 7, app D) (see TM 9-1010-221-10).

M203 40mm Grenade Launcher Nomenclature

NOTE

Barrel must be closed to function the firing mechanism. Step 3. Check for water or oil in firing pin recess (1),

Point muzzle up and handfunction barrel and firing mechanism (3).

Grenade Launcher Meganism

ARMY TM 9-1010-221-23&P AIR FORCE TO 11W3-9-4-2 MARINE CORPS TM 07700A-23&P/2 NAVY SW 370-AE-MMI-010

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