Confirm Grenade Launcher And Host Weapon Are Unloaded And Safe

1. Remove the M203 grenade launcher from its host weapon (if it is attached).

2. Remove the original factory mount from the M203 or M203A1 grenade launcher (if it is attached).

3. Thoroughly clean the front mount receiving area of the receiver, and particularly the screw holes and their threads, with degreaser such as dry cleaning solvent (app D, item 9).

4. Compare the illustration below with the quick release bracket parts for familiarization:

LEFT BRACKET ASSEMBLY

RIGHT HALF BASE

a h lit

FIVE POSITION SHIM PLATE

2 SOCKET HEAD CAP SCREWS

2 SPRING WASHERS

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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