Section II. OPERATION UNDER USUAL CONDITIONS

TM 3-1040-214-12

2-4. Trigger

b. Purpose. The shutoff valve handle is connected

to the shutoff valve. The valve is opened by turning the

a. Location.

The trigger (fig. 2-1) is located

handle counterclockwise and is closed by turning the

immediately below the valve section of the gun.

handle clockwise. Opening the shutoff valve permits

b. Purpose. The trigger controls the releasing of

venting of the agent tanks.

agent under pressure from the gun. Squeezing the

trigger opens a constriction in the rubber tube permitting

pressurized air to disperse agent. Releasing the trigger

blocks the tube passage in the rubber tube, and the flow

2-3. Pressure Tank Valve Handle

of agent is stopped.

a. Location. The pressure tank valve handle (fig.

2-2) is located at the lower right side of the tank group.

2-5. Trigger Safety

It is located at the operator's right hip when he is

a. Location. The trigger safety (fig. 2-1) is located

carrying the tank group.

on the trigger.

b. Purpose.

The valve handle operates the

b. Purpose.

The trigger safety has to be

pressure

tank

valve.

Moving

the

handle

depressed and disengaged from the safety catch before

counterclockwise opens the pressure tank valve and

the trigger can be actuated. The trigger safety prevents

releases pressurized air to the agent tanks. Moving the

accidental operation of the gun.

handle clockwise closes the valve.

Section II. OPERATION UNDER USUAL CONDITIONS

assembly, and his right hand is positioned on the handle

2-6. General

of the valve section (fig. 2-3).

This section contains instructions for operating the M3

disperser under usual conditions.

2-9. Firing Procedure

2-7. Protective Clothing

WARNING

Personnel will wear a protective mask, M6 protective

Personnel must wear a protective

mask hood, and rubber gloves during agent filling,

mask, protective mask hood, and

operating, cleaning, and decontaminating the M3

rubber gloves when using the M3

disperser.

disperser.

a. Protective Mask and M6 Protective Mask Hood.

The protective mask and the M6 protective mask hood

WARNING

are not furnished as part of this equipment. They must

be requisitioned separately.

Agent

regarded

nonflammable; however, the finely

b. M3 Rubber Gloves. Two pairs of rubber gloves

divided dust suspended in air may be

are packed with the disperser.

ignited by a weak spark and

constitutes an explosive hazard

2-8. Carrying Instructions

(AMCR 385-104). Minimum explosive

dust concentration is 0.025 oz/ cu ft.

a. Tank Group. The tank group is carried on the

back of the operator (fig. 2-3). It is secured to the

operator's body by shoulder and body straps. Position

a. Firing Position. The disperser can be fired from

the tank group on the operator's back as follows:

either a standing or a kneeling position.

(1) Connect the quick-release buckle on the

left shoulder strap and slide the left arm into the sling.

NOTE

Bring the right shoulder strap over the right shoulder and

connect the quick-release buckle on the right side.

To effectively disperse the agent,

hold the agent tanks in an upright

(2) Secure the body strap.

position during firing.

(3) Adjust the shoulder and body straps to

insure a comfortable fit.

b. Aiming. During firing operations, aim the gun

b. Gun Group. The gun is carried at the operator's

downwind toward the target. If operating in a crosswind

right side. His left hand grasps the handle of the barrel

is unavoidable, adjust the drift of agent.

2-3