Training practice--M879, M880, M68, and sabot. (2) The barrel is locked to the baseplate, and the open end of the socket points in the direction of fire. d. The gunner rough levels the cross-level bubble by making the bubble bounce from one side to the other. The assistant gunner attempts to maintain the traversing mechanism on a horizontal plane. High explosive is used for both fragmentation and blast effect against personnel and light-skinned vehicles. He moves the mortar until the vertical line of the sight is aligned approximately on the aiming post. Several types of RP/WP ammunition are described herein. The components of the mortar consist of a cannon, mount, and baseplate. Then he relocks the barrel clamp. News. (3) The M84A1 fuze is a single-purpose, tungsten-ring, mechanical-time fuze used with the 81-mm M301A3 illumination cartridge. (1) Mask clearance and overhead clearance are sufficient. The cartridges are returned to their original containers. The gunner is given a deflection change between 5 and 25 mils, either increasing or decreasing from the last stated deflection, and the command to refer and realign aiming posts. Cartridges assembled with the M532 fuze must be fired above charge 0. When fired, the cartridge carries the ignition cartridge with it, leaving the mortar ready for the next cartridge. This is accomplished by depressing the barrel until the top of the mask is clear. a. e. The assistant gunner passes the round to the first ammunition bearer who inspects it for the cause of the misfire. Safety before firing is provided by a safety wire, which must be removed just before firing. The M889 HE cartridge (M252 onlyXUS Marine Corps) is of the same construction as the M821 cartridge in every detail except the fuze, which is the M935. The Mark 4 and 5 barrels were introduced during World War 2 and have a much increased range. The enemy will use them. mortar, 81-mm: m29a1 and m29; firing cartridge, he, m374a2 and m374; cartridge, wp, m375a2 and m375 (s&i by prop see details, footnotes) ardec: ft 81-al-4(abr) active: 12/24/1970: firing tables for mortar, 81mm, m29 and m1 firing cartridge, illuminating, m301a3 with fuze, time, m84a1, height of burst, 600 meters (s&i by prop see details .
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