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 b. M557 or M572 Point Detonating Fuze The M557 and M572 fuzes (2) have selective superquick delay setscrews. The fuzes are packed set for superquick and have a booster attached. Premature functioning can occur when fuzes are fired in heavy precipitation: i.e., rainfall, sleet, snow, or hail. These fuzes can be set to SQ (superquick) or DELAY action by turning the setscrew. The M572 fuze is identical to the M557 fuze with the exception of epoxy under the steel ogive. The M572 fuze is handled, set, and fired the same as the M557 fuze. 1 2 Change 5 5-30.1/(5-30.2 blank)