TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download
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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. 5-30 Change 5