1. Introduction to TC 3-22.19
This document serves as an instruction manual for understanding and navigating the content of Training Circular (TC) 3-22.19, titled "GRENADE MACHINE GUN MK 19 MOD 3." TC 3-22.19 is an official publication by the US Army, designed to provide comprehensive guidance and information regarding the MK 19 MOD 3 weapon system. It is intended for military personnel, trainers, and anyone requiring detailed knowledge of the MK 19 MOD 3's operational aspects, maintenance, and associated terminology.
The primary purpose of TC 3-22.19 is to standardize training and operational procedures, ensuring consistent understanding and application across various units. This instruction manual will help users effectively interpret the structure and specific terminologies used within the Training Circular.
2. Understanding Terminology and Definitions
TC 3-22.19 employs a precise system for presenting terms and definitions to ensure clarity and consistency. Users should pay close attention to the following conventions:
- Joint Terms: Where applicable, the circular incorporates joint terms, reflecting common usage across different military branches.
- Glossary and Text: Selected joint and Army terms, along with their definitions, are presented both within the main text and in a dedicated glossary section.
- Proponent Publication Terms: Terms for which TC 3-22.19 is the authoritative publication (the proponent) are specifically highlighted. These terms are italicized in the main text and marked with an asterisk (*) in the glossary.
- Boldfaced Definitions: Definitions for which TC 3-22.19 is the proponent publication are presented in boldfaced text within the manual.
- Referenced Definitions: For definitions originating from other publications, the term is italicized, and the number of the originating proponent publication follows the definition.
3. Scope and Application
While the detailed operational and maintenance procedures are contained within TC 3-22.19 itself, this manual generally covers:
- Characteristics and capabilities of the MK 19 MOD 3 Grenade Machine Gun.
- Principles of operation and firing procedures.
- Routine maintenance and field servicing.
- Safety precautions and handling procedures.
- Ammunition types and usage.
Adherence to the guidelines and procedures outlined in TC 3-22.19 is crucial for the safe and effective use of the MK 19 MOD 3 Grenade Machine Gun.
4. Document Overview

Image 1: Front cover of the TC 3-22.19 Grenade Machine Gun MK 19 MOD 3 manual. This image displays the title, publication number, and issuing authority, indicating it is an official US Army document.

Image 2: Back cover of the TC 3-22.19 manual. This view typically includes publication details such as ISBN-13 and a barcode, confirming its identity as a published work.
5. Additional Information
This Training Circular supersedes FM 3-22.27, dated 28 November 2003, indicating an update to previous guidance. The publication date for TC 3-22.19 is July 21, 2021, reflecting the most current information available at that time. It is published by Independently published, under the authority of the US Army.