Chapter Introduction

1. General.

a. Purpose and Scope. The purpose of this manual is to provide a source of information to individual soldiers and guidelines to instructors on the Submachineguns, Caliber .45, M3 and M3A1. The material presented for the individual soldier includes mechanical training, marksmanship training, familiarization firing, and other information pertaining to the care and handling ofthe weapon. The advice to instructors chapter is not intended as a final guidance, but as a starting point for commanders to use in establishing a training program for the sub-machinegun.

b. Importance of Submachinegun Training. The submachine-gun is a secondary individualweapon intended primarily for self-defense in close combat. It is primarily carried by members of tank crews, on combat engineer vehicles, and battalion/squadron maintenance personnel. It is used at close ranges or when a crew must dismount from a disabled vehicle. The soldier must keep his weapon in good working condition and have the utmost confidence in his marksmanship ability. This ability can be acquired only through study and practical training.

2. Changes.

Users of this publication are encouraged to submit recommended changes or.comments to improve the publication. Comments should be keyed to the specific page, paragraph, and line of the text in which the change is recommended. Reasons will be provided for each comment to insure understanding and complete evaluation Comments should be prepared using DA Form 2028 (Recommended Changes to Publications and Blank Forms) and forwarded direct to Command, US Army Armor School, ATTN: ATSB-TD-DD, Fort Knox, Kentucky 40121.

3. General Description.

a. Submachinegun. The Submachineguns, Caliber .45, M3 and M3A1 (hereafter referred to as the M3 or M3A1 ), are air-cooled, blowback-operated, magazine-fed, automatic shoulder-fired weapons (fig 1 thru 4). They are light, compact, and rugged. The stock is one piece of formed steel rod which can be telescoped for ease of handling; its ends are drilled and tapped so that it can be used as a cleaning rod. The stock may also be used as a disassembly tool or wrench. The stock of the M3A1 has a hand loader that is used to load the magazine.

b. Magazine. The magazine (fig 1 thru 4) holds 30 cartridges. The upper cartridge is stripped from the magazine and chambered by the forward movement of the bolt. When the last cartridge from the magazine has been fired, the bolt closes on the empty chamber.

c. Rate of Fire. The automatic rate of fire is limited only by the firers ability to change magazines rapidly, aim and fire. There is no provision for semiautomatic fire; however, because of the low cyclic rate of fire, the firer can fire single shots by proper trigger manipulation.

Stock

Rear sight

Sling

Cover

Front sight

6. Barrel

7. Barrel ratchet

8. Magazine

9. Retracting handle 10. Housing assembly

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