The M375 cartridge uses the M90 propelling charge while the M375A2 and M375A1 cartridges use the M90A1 propelling charge. He stands to the rear of the baseplate and supports the barrel until the bipod is fitted. The ignition cartridge has a percussion primer and is assembled to the end of the fin assembly. Tabulated data. A proximity fuze is an electronic device that detonates a projectile by means of radio waves sent out from a small radio set in the nose of the projectile. Standard A ammunition for the M29A1 mortar is Standard B for the M252 mortar (, Light green Yellow band with red markings. It weighs about 9.05 pounds. If water is not available, the gunner must stand clear of the mortar until the barrel is cool. He indicates the initial direction of fire by pointing in that direction and commands ACTION. (1) The M772A1 fuze is a MTSQ. Following the arm-and-hand signals of the gunner (who is looking through the sight unit), he moves the far aiming post so that the gunner obtains an aligned sight picture. Both legs are fitted with a disk-shaped foot with a spike beneath to prevent the mount from slipping. Swifty 3 from scratch; Swifty 3 split-repo setup; Swifty Troubleshooting; Mods. (6) The primer cartridge is checked for damage or dampness. The aluminum tail assembly has six integral fins equally spaced around the rear, which stabilize the round in flight. Training practice--M879, M880, M68, and sabot. The gunner removes the sight and places it in the case with 3200 deflection and 0800 elevation indexed. To make the shift, the gunner places the fingers of his right hand in the muzzle and his left hand on the left leg. e. The pull wire and safety wire are removed from the fuze just before firing. CANNON . High angles of approach (near vertical) give the lowest burst heights. b. That is generally how I use mortars. 0.50, BROWNING, M2; FIRING CARTRIDGE, ARMOR-PIERCING-INCENDIARY, CAL. The mortar is mounted and the sight is installed. They are assembled with either an M524-series, M526-series, or M567 fuze. He has the duty of preparing the ammunition and passing it to the assistant gunner. MFCS Mounted. f. Ammunition should be stored under cover. ) or https:// means youve safely connected to the .gov website. He performs other duties as the squad leader directs. The M1 was a derivative of the French mle 27/31 system (itself an improved form of the Stokes Trench Mortar of World War 1 fame) and slightly altered to suit American needs. The sight bracket is attached to the buffer carrier, which is fitted to the traversing screw assembly. The wrench (P/N 9349539) sets M772 MT and M768 time fuzes. 0.30, BROWNING, M1919A4, M1919A5 AND M1919A6 {TO 39A-5 AF-32} (S&I BY PROP SEE DETAILS, FOOTNOTES), GUN, MACHINE, CAL. It has four function settings: PRX (proximity) causes the cartridge to explode between 3 and 13 feet above the ground; NSB (near-surface burst) causes the cartridge to explode up to 3 feet above the ground; IM (impact) causes the cartridge to explode on contact; and DLY (delay) incorporates a 0.05-second delay in the fuze train before exploding the cartridge. .50: BALL, M2 (S&I BY PROP SEE DETAILS, FOOTNOTES), FIRING TABLES FOR WEAPON, 5.56MM, M16A1 WEAPON, 5.56MM, M16A2 WEAPON, 5.56MM, M249 AND WEAPON, 5.56MM, M4 FIRING CARTRIDGE, BALL, M855 CARTRIDGE, TRACER, M858 CARTRIDGE, BALL, M193 CARTRIDGE, TRACER, M196 (S&I BY PROP SEE DETAILS, FOOTNOTES), MACHINE GUN, 7.62-MM: M60 ON MOUNT, MACHINE GUN: 7.62-MM, M122 AND MACHINE GUN, 7.62-MM: M73 ON TANK, COMBAT, FULL-TRACKED: 105-MM GUN, M60 SERIES AND RIFLE, 7.62-MM: M14; FIRING CARTRIDGE, 7.62-MM, BALL, NATO, M59; CARTRIDGE, 7.62-MM, BALL, NATO, M80; CARTRIDGE, 7.62-MM: AP, NATO, M61 AND CARTRIDGE, 7.62-MM: TRACER, NATO, M62 (REPRINTED W/BASIC INCL C1) (S&I BY PROP SEE DETAILS, FOOTNOTES), ADDENDUM TO FT 8-Q-1 FOR PROJECTILE, HE, M404 (S&I BY PROP SEE DETAILS, FOOTNOTES), ADDENDUM TO FT 8-J-4 FOR PROJECTILE, HE, M404 (S&I BY PROP SEE DETAILS, FOOTNOTES), ADDENDUM TO FT 8-T-1 FOR PROJECTILE, HE: M509A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 8-INCH HOWITZER, M201A1 ON HOWITZER, HEAVY, SELF-PROPELLED, 8-INCH, M110A2 FOR LOW ANGLE FIRING PROJECTILE, HE, M509A1 USING REGISTRATION DATA FOR PROJECTILE, HE, M106 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 8-INCH HOWITZER: M2 AND M2A1 ON HOWITZER, HEAVY, TOWED: 8-INCH, M115; CANNON, 8-INCH HOWITZER: M47 ON HOWITZER, HEAVY, SELF-PROPELLED, FULL TRACKED: 8-INCH, M55; CANNON, 8-INCH HOWITZER: M2A1E1 ON HOWITZER, HEAVY, SELF-PROPELLED: 8-INCH, M110; FIRING PROJECTILE, HE: M106 AND PROJECTILE, CHEMICAL: M426 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 8-INCH HOWITZER, M201 ON HOWITZER, HEAVY, SELF-PROPELLED: 8-INCH, M110A1 AND CANNON, 8-INCH HOWITZER, M201A1 ON HOWITZER, HEAVY, SELF-PROPELLED: 8-INCH, M110A2 AND FIRING PROJECTILE, HE, M106 PROJECTILE, CHEMICAL, M426 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 8-INCH HOWITZER: M201A1 ON HOWITZER, HEAVY, SELF-PROPELLED, 8-INCH, M110A2; FIRING PROJECTILE, HE, RA; M650 AND PROJECTILE, ATOMIC: M753 AND M753A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 8-INCH HOWITZER, M201A1 ON HOWITZER, HEAVY, SELF-PROPELLED: 8-INCH, M110A2 FIRING PROJECTILE, HE, M509A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 14.5-MM GUN, M31; ARTILLERY TRAINER FIRING FUZED CARTRIDGES, M181, M182 AND M183 (S&I BY PROP SEE DETAILS, FOOTNOTES), GUN, 20-MM, AUTOMATIC, M139; FIRING CARTRIDGE, 20-MM, HEIT, M599; CARTRIDGE, 20-MM, TPT, M206 AND CARTRIDGE, 20-MM, APIT, M601 (S&I BY PROP SEE DETAILS, FOOTNOTES), FIRING TABLES FOR CANNON, 25MM GUN, M242 ON INFANTRY FIGHTING VEHICLE, M3 FIRING CARTRIDGE, APDS-T, M791 CARTRIDGE, HEI-T, M792 CARTRIDGE, TP-T, M793 CARTRIDGE, TPDS-T, M910 (S&I BY PROP SEE DETAILS, FOOTNOTES), GUN, AUTOMATIC, 40-MM, M1 AND GUN, DUAL AUTOMATIC, 40-MM, M2; FIRING CARTRIDGE, HE-T, SD, MK 2 WITH FUZES, PD, MK 27, M64A1, M71 OR NO. 81MM M252A1. The enemy will use them. XM1210. Several types of RP/WP ammunition are described herein. The fuze consists of a brass head, body assembly, and expelling charge. It comes preset to function on SQ/IMP, and the selector slot should align with the SQ mark on the ogive. The M252 81mm Medium Extended Range Mortar is a crew-served, medium weight mortar which is highly accurate and provides for a greater range (4,500 meters to 5,650 meters) and lethality than the . a. The explosive elements in primers and fuzes are sensitive to shock and high temperature. d. The ammunition is protected from mud, sand, dirt, and water. It is a smooth-bore, muzzle-loading, high-angle-of-fire weapon used for long-range indirect fire support to light infantry, air assault, and airborne units across the entire front of a battalion zone of influence. If the line of sight clears the mask, it is safe to fire. Overhead interference can be branches of trees or roofs of buildings. The following are authorized (Standard B) cartridges for the 81-mm mortar, M252: Each cartridge has fins around the tail to stabilize it in flight and to cause it to strike fuze-end first. Since phosphorus liquefies at about 100 degrees Fahrenheit, the ammunition is protected against an uneven rehardening of the filler. It can provide all-weather, ground-based, close supporting, accurate, immediately a. He must not stand directly behind the mortar. The 0-second boss is wider and differs in shape from the other body bosses; the safe setting position is indicated by the letter "S" on the fuze body. A lock ( The fuze is screwed into the cartridge body, and it is seated and secured using an M18 wrench. In the U.S. Army and U.S. Marine Corps, it is normally deployed in the mortar platoon of an infantry battalion. The Mark 4 and 5 barrels were introduced during World War 2 and have a much increased range. (b) In selecting the exact mortar position, the leader looks quickly for mask clearance and overhead interference. This section discusses the. It is set using the bladed end of the M18 fuze wrench. Theme by TechDoc. SMALL DEFLECTION AND ELEVATION CHANGES. These propellants are flash-suppressed and clean burning resulting in minimum residue, flash and blast overpressure. If the mortar section is to operate quickly and effectively in accomplishing its mission, mortar squad members must be proficient in individually assigned duties. It has a time setting of up to 25 seconds. The increments are individually wrapped with waterproof bags that are not removed. Then it is removed from the bipod and laid horizontally on the ground at the dud pit until it can be turned over to ordnance personnel. c. Mechanical Time. The 0-second boss is wider and differs in shape from the other body bosses; the safe setting position is indicated by the letter "S" on the fuze body. The fuze wrench, M18, assembles the fuze to the cartridge, and the bladed tip on the end sets PD-type fuzes. Red phosphorus/white phosphorus--M819 and M375-series. The M252 81 mm medium weight mortar is a British designed smooth bore, muzzle-loading, high-angle-of-fire weapon used for long-range indirect fire support to light infantry, air assault, and airborne units across the entire front of a battalion zone of influence. The gunner is given a deflection and elevation change in a fire command causing the gunner to shift the mortar between 200 and 300 mils for deflection and between 100 and 200 for elevation. It should be destroyed in accordance with standard procedures. Fired . The M252 81 mm medium weight mortar is a British-designed smooth bore, muzzle-loading, high-angle-of-fire weapon used for long-range indirect fire support to light infantry, air assault, and airborne units across the entire front of a battalion zone of influence. .50: BROWNING, M2 (HEAVY BARREL, FLEXIBLE) ON MOUNT, MACHINE GUN, TRIPOD MTD, CAL. The BAD is removed only by qualified maintenance personnel. See Chapter 3, paragraph 3-14 for a detailed discussion of malfunctions. *FREE* shipping on qualifying offers. The removable increments are fitted onto or around the shaft, depending on their type. (3) From this train, extend a starting train that will burn against the wind of single increments laid end to end. Identification. He exposes 4 inches (100 millimeters) of elevation shaft and folds the handle. He ensures that the firing pin recess is facing upwards. The tabulated data of the 81-mm mortar, M252, are shown in Table 4-1. The propellant train (except the training cartridge) consists of an ignition cartridge and propellant charges. In charge was the platoon commander - normally a lieutenant. The gunner is given an administrative command to lay the mortar on a deflection of 2860 or 2740 mils.
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