TM-9-2350-311-10

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 556 of 775

TM 9-2350-311-10

5-2

AUTHORIZED MUNITIONS — CONTINUED

5-2.2 Authorized Fuzes

WARNING

The firing of a field artillery round without a fuze or with an unauthorized fuze is strictly

prohibited as an inbore explosion may result.

Paragraph 5-2.2 describes some of the fuzes to be used with this weapon. For additional information and

more detailed descriptions and functioning of the authorized fuzes, see TM 43-0001-28.

a.

MK399 MOD 1 (Mout) Point Detonating Fuze

The MK399 fuze (1) is primarily for use against urban structures (bunkers, buildings, etc.). The fuze has a

setscrew that can be turned by a flathead screwdriver or M18 fuze wrench to select PD (point detonating)

or DLY (delay) function. When set to PD, the fuze functions superquick which is useful for spotting

purposes. When set to DLY, the fuze penetrates the target to function the projectile inside the target. The

fuze is assembled with a booster pellet and set to PD for shipping. This fuze is rain sensitive.

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