Gas CN-DM-M6; CN-M7, and CN-M7A1; also Fuze M201A1

Length, inches

5

Diameter, inches

Color

Filling

Fuze

Delay, seconds

2

Description: These grenade are of the burning type; they do not explode. Theay have a cylindrical body made of thin plate. The M7A1 has a half-inch gas port in the bot-tom and four ports in the head, covered by small squares of adhesive tape. A center hole is placed through the CN-mixture. At the top and in this hole is the starter mixture. The M6 and M7 have three lines of six gas ports in the body and four ports in the head. co-vered by small squares of adhesive tape.

The Fuze M201A1 threads into the top of these grenades. It is essentially the same as the Igniting Fuze M10A3 used in the fragmentation hand grenade. However, there is only a two-second delay element, an igniter, and no detonator. This results in a fuze with a much shorter body. At the top of the body, one side is extended to form a lip for the attachment of the safety lever; the other side forms a hinge to carry the spring-loa-ded striker. The striker is restrained by the safety lever. The elver is hooked over the lip of the fuze body and extends across the head of the fuze, over the striker, and down the side of the grenade. The lever is held in position for shipping and handling by a split safety lever, through the fuze body, and over the striker, to protrude on the other side, where it is spread so that a pull of between 20 and 30 pounds is required to withdraw it.

Operation: When the safety pin is removed preparatiry to throwing, the lever is held in place by the hand holding the grenade. When the grenade is thrown, the lever is re-leased. The striker, driven by its spring, throws off the lever and rotates about its pivot to strike the primer. The primer ignites the delay element, which takes about two se-conds to burn through to the igniter. The igniter ignites the starter mixture, which crea-tes enough heat to vaporize the chemical ingredients. The pieces of adhesive tape co-vering the gas ports are blown of burned off and gas is emitted. The gas generation rea-ches full volume three seconds after the safety lever is released, and gas is emitted for from 20 to 60 seconds. The M7A1 has an average burning time of 45 seconds.

Remarks: The M7A1 is an improved model of the M7, which is now substitute stand-ard. The tendency of the M7 to flame or explode upon ignition has been eliminated in the M7A1, which also produces more than double the concentration of CN smoke and vapor.

Figure 224. Chemical Grenade