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This manual provides technical information on and training and combat techniques for the M203 grenade launcher. Intended users include leaders and designated grenadiers, who will use this information to successfully integrate the M203 into their combat operations. This manual discusses gunnery training and train-the-trainer and includes an appendix on the 40-mm grenade launcher, M79.

The tactical positions shown in this manual were drawn to enhance the reader's understanding of related subject material and are not tactically correct.

Unless stated otherwise, masculine nouns and pronouns in this publication do not refer exclusively to men.

The proponent of this publication is the United States Army Infantry School. Send comments and recommendations on DA Form 2028 (Recommended Changes to Publications and Blank Forms) directly to Commandant, United States Army Infantry School, ATTN: ATSH-ATD, Fort Benning, GA 31905-5595 or send an email to

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