81mm mortar range tableis there sales tax on home improvements in pa

Cartridges assembled with the M532 fuze must be fired above charge 0. The traversing screw assembly is fitted to the clamp assembly, which is pivoted in the center on an arm attached to the elevating leg. b. (703) 614-3727, Office of the Chief Information Officer Correctly applying and performing these duties enables the mortar section to perform as an effective fighting team. Excess increments should not accumulate near the mortar positions but are removed to a designated place of burning and destroyed. M252 81mm Mortars The M252 81mm medium extended range mortar (see diagram below) is a crew-served, smooth bore, muzzle loaded, high angle of fire weapon system. The fuze wrench, M18, assembles the fuze to the cartridge, and the bladed tip on the end sets PD-type fuzes. The components of the mortar consist of a cannon, mount, and baseplate. He tightens the leg-locking handwheel (ensuring the teeth are correctly meshed) and fastens the securing strap over the arm and around the buffers. e. The squad leader picks up the aiming posts and sight. FIRING TABLE FOR CANNON, 155MM HOWITZER, M185 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A1; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A1B; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A2; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3; AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3B; AND CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A5 AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6 AND CANNON, 155MM HOWITZER, M199 ON HOWITZER, MEDIUM, TOWED, 155MM, M198 FIRING PROJECTILE, GUIDED, M712 (COPPERHEAD) WITH SHAPED TRAJECTORIES (S&I BY PROP SEE DETAILS, FOOTNOTES), PROVISIONAL AIMING DATA FOR CANNON, 155MM, HOWITZER, M185 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, 109A1 HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, 109A1B HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A2 AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3 HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A3B AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A4 AND CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A5 AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6 AND CANNON, 155MM HOWITZER, M199 ON HOWITZER, MEDIUM, TOWED, 155MM, M198 AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A1 FIRING PROJECTILE, BASE-BURN, M864 AND M864A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), PRELIMINARY AIMING DATA FOR CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6 AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A2 FIRING PROJECTILE, HE, XM982 (S&I BY PROP SEE DETAILS, FOOTNOTES), PROVISIONAL AIMING DATA FOR CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6 AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A2 FIRING PROJECTILE, HE, XM982 (S&I BY PROP SEE DETAILS, FOOTNOTES), PROVISIONAL AIMING DATA FOR CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6 AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A2 FIRING PROJECTILE, HE, M982 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 165-MM GUN, M135 ON COMBAT ENGINEER VEHICLE, FULL TRACKED, M728; FIRING CARTRIDGE, 165-MM, HEP, M123A1 AND 165-MM, TP-T, XM623 (S&I BY PROP SEE DETAILS, FOOTNOTES), CANNON, 175-MM GUN, M113 AND M113A1 ON GUN, FIELD ARTILLERY, SELF-PROPELLED: 175-MM, M107; FIRING PROJECTILE, HE, M437A2 AND M437A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), RAPID FIRE TABLES FOR CALCULATION OF THE EXECUTIVE OFFICERS (XOS) MINIMUM QUADRANT ELEVATION WITH CANNON, 105MM HOWITZER, M20A1 ON HOWITZER, LIGHT, TOWED, 105MM, M119A1; HOWITZER, LIGHT, TOWED, 105MM, M119A2; HOWITZER, LIGHT, TOWED, 105MM, M119A3 FIRING WITH PROPELLING CHARGES, M67 AND M200 (S&I BY PROP SEE DETAILS, FOOTNOTES), RAPID FIRE TABLES FOR CALCULATION OF THE EXECUTIVE OFFICER S (XO S) MINIMUM QUADRANT ELEVATION WITH CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A5/A6 AND CANNON, 155MM HOWITZER, M199 ON HOWITZER, MEDIUM, TOWED, 155MM, M198 AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A1/A2 FIRING WITH PROPELLING CHARGES, M231, M232, AND M232A1 (S&I BY PROP SEE DETAILS, FOOTNOTES), RAPID FIRE TABLES FOR CALCULATION OF THE EXECUTIVE OFFICERS (XOS) MINIMUM QUADRANT ELEVATION WITH CANNON, 155MM HOWITZER, M284 ON HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A5; HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A6; AND HOWITZER, MEDIUM, SELF-PROPELLED, 155MM, M109A7, AND CANNON, 155MM HOWITZER, M776 ON HOWITZER, MEDIUM, TOWED, 155MM, M777A1 AND HOWITZER, MEDIUM, TOWED, 155MM, M777A2 FIRING WITH PROPELLING CHARGES, M231, M232, AND M232A1 (S&I BY PROPONENT, SEE DETAILS, FOOTNOTES), ADDENDUM TO FTR LANCE-B-1 FOR WARHEAD SECTION, GUIDED MISSILE, HE: M251 (U) (S&I BY PROP SEE DETAILS, FOOTNOTES), Search Army publications and forms by Number, Title, or Record Detail. He has the duty of preparing the ammunition and passing it to the assistant gunner. c. The gunner grasps both ends of the traverse screw assembly and supports the mortar during the subsequent drill. Prev - Mk6 Mortar range table for charge 0 Next - Mk6 Mortar range table for charge 2 . In the U.S. Army and U.S. Marine Corps, it is normally deployed in the mortar platoon of an infantry battalion. (1) The barrel is clean and free from grease and oil both inside and out. He stands to the rear of the baseplate and supports the barrel until the bipod is fitted. b. 4-11. The adjustment ring has six raised ribs for use in conjunction with fuze setter, M25, and a setting indicator rib (marked SET) about half the height and width of the other six ribs. The settings are obtained from the range tables and are applied using a wrench (number 9239539) or a 1 3/4-turn open-end wrench. The gunner stands to the left side of the mortar where he can manipulate the sight, elevating handwheel, and traversing handwheel. The gunner removes the sight and places it in the case with 3200 deflection and 0800 elevation indexed. The propelling charge is contained in four horseshoe-shaped, felt-fiber containers or nine wax-tested, cotton cloth, bag increments. He must not stand directly behind the mortar. e. The M362A1 and M362 HE cartridges are of steel forge construction and contain about 2.10 pounds of composition B explosive. They use the M5 propelling charge that consists of eight cloth bags attached to the tail unit. He maintains the ammunition for firing and provides local security for the mortar position. They are assembled with either an M524-series, M526-series, or M567 fuze. (2) The ribs and braces have no breaks, cracks, or dents. Both legs are fitted with a disk-shaped foot with a spike beneath to prevent the mount from slipping. The adjustment ring has six raised ribs for use in conjunction with fuze setter, M25, and a setting indicator rib (marked SET) about half the height and width of the other six ribs. It engages the 1 3/4-inch flats on the setting ring or the fuze head. A spring-loaded locating catch is behind the elevating gear housing, which locates the plain leg in its supporting position for level ground. 0.50, BROWNING, M2; FIRING CARTRIDGE, ARMOR-PIERCING-INCENDIARY, CAL. The gunner moves the mortar as the assistant gunner steadies it. The ammunition that can be fired by the 81-mm mortar, M252, is identified and described herein. A .mil website belongs to an official government organization in the United States. on Amazon.com. It has a time setting of up to 50 seconds. Mortars are indirect-fire weapon systems. The squad leader notifies the FDC of the minimum mask clearance elevation. 9301 Chapek Road., Bldg.1458 The M375A3 cartridge is ballistically similar to the M374A3 (HE) cartridge. The RSTA squadron only receives the 120mm mounted mortar, there is no augmentation dismounted maneuvers. [1] [2] Many countries use or used an 81 mm mortar in their armed forces. Designed by Thingsym. Illuminating is used for battlefield illumination and signaling. He may assist the gunner in shifting the mortar when the gunner is making large deflection changes. (e) If the mask is not regular throughout the sector of fire, the gunner determines the minimum mask clearance as described above. To convert the fuze from PROX to SQ/IMP, the top of the fuze must be rotated 120 degrees (one-third turn) in either direction. FT 81-AI-3 Firing Tables Mortar, 81mm: M28A1 and M29 Mortar 81mm Self propelled M125A1 and M125 Carrier, 81mm Mortar Tracked XM755 [US Army.] The barrel is then rotated a quarter turn to unlock it from the socket, and it is placed in an area designated by the squad leader. high-explosive bomb at a range of about three miles. Types of rounds, classification, and characteristics for the 81-mm mortar, M252. When the baseplate is in position, the first ammunition bearer lowers the breech plug into the rotating socket and rotates the barrel a quarter of a turn to lock it. He uses the chain of command to assist him in effecting his command and supervising duties. The M252 81mm mortar is a smooth-bore, muzzle-loaded, high-angle-of-fire weapon. c. The M374A3 HE cartridge is constructed from pearlitic malleable cast iron and contains about 2.10 pounds of composition B explosive. General Dynamics Ordnance and Tactical Systems' 81mm Roll Controlled Guided Mortar (RCGM) provides an affordable, flexible solution to meet that need. Official websites use .mil If required, the gunner/assistant gunner lowers the barrel so that the breech plug engages with the open end of the socket, and he uses the barrel as a lever to move the socket. The 81-mm mortar, M252, is a smooth-bore, muzzle-loaded, high-angle-of-fire weapon. Maximum Range (meters): 7,240 (with standard fuze) . It uses the M772 mechanical time fuze and weighs about 10.6 pounds. He makes large deflection shifts by shifting the bipod assembly and keeps the bubbles level during firing. I say 120s are bad because they suffer from terrible dispersion even when not shooting at 6km. 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. He ensures that the firing pin recess is facing upwards. 120mm IHE grenade DM91. How the RCGM works: Target coordinates are programed into the RCGM using a portable GPS setter. The M734 multioption fuze is the only one used with the 81-mm mortar. The gunner is given a deflection change in a fire command between 20 and 60 mils inclusive. d. The gunner rough levels the cross-level bubble by making the bubble bounce from one side to the other. An 81 mm mortar is a medium-weight mortar. When cartridges have been prepared for firing, but are not used, all powder increments and safety wires are replaced. The cartridge weighs about 9.12 pounds. The gunner levels the elevation bubble by turning the elevation micrometer knob and reading the setting on the elevation scale and elevation micrometer--this setting is the minimum mask clearance. He places the sight case and aiming posts to the left front of the mortar position. He then checks the sight picture to ensure he is within 20 mils of a proper sight picture. It uses the M205 propelling charge, consisting of four horseshoe-shaped increments fitted around the tail. The obturating ring ensures equal muzzle velocities in hot or cold barrels by keeping all the gases in the barrel until the cartridge has fired. Ammunition Lot Number. It is assembled with the M772A1 MTSQ. After the mortar is mounted, the gunner makes a thorough check. It is designed to be fired in the indirect fire mode, cannot be fired handheld, and norm ally utilizes a FDC. The second page includes a chart with range and deflection (presumably for the same kind of shells), as well as notes which give additional instructions. With the mortar mounted and the sight installed, the gunner lays the sight on the two aiming posts (placed out 50 and 100 meters from the mortar) on a referred deflection of 2800 mils and an elevation of 1100 mils. WP cartridges are stored with the fuze end up. It arms within a maximum of 2.50 seconds. Burst Height. The fuze consists of a brass head, body assembly, and expelling charge. The leg-locking handwheel must then be tightened, ensuring the teeth are correctly meshed. .50 MACHINE GUN, M55 AND MACHINE GUN, CAL. He exposes 1 inch (25 millimeters) of cross-level shaft and folds the handle. The cartridge is dropped down the barrel, fin-end first. The muzzle end has a short tapered lead-in which acts as a . Agreed that mortars should generally be used close to the frontline. System (including basic issue items) Normally, it can be moved by hand, although this may be difficult to do if the mortar is moved through a large arc. The M375 cartridge uses the M90 propelling charge while the M375A2 and M375A1 cartridges use the M90A1 propelling charge. 81mm smoothbore mortar Barrel length 1.28 m Muzzle velocity 225 m/s Elevation +45 to +85 Traverse 18 Fire control Sights C2 indirect fire sight with illumination Firepower Rate of fire 20 rpm maximum 15 rpm normal 1 to 12 rpm sustained Range 5.650 m maximum 100 m minimum Media 81mm L16A2 b. The gunner unlocks the barrel clamp and rotates the barrel, unlocking the breech plug from the rotating socket of the baseplate. .50: BROWNING, M2 (HEAVY BARREL, FLEXIBLE) ON MOUNT, MACHINE GUN, TRIPOD MTD, CAL. (4) The M567 fuze is an impact fuze that has a SQ/IMP or D function. The 81mm mortar rounds use Red Phosphorus as the smoke generating agent. The barrel clamps are then closed. .50: BROWNING, M2 (HEAVY BARREL, TURRET TYPE) ON MOUNT, MACHINE GUN, TRAILER MTD: MULTIPLE CAL. The M374 cartridge is fitted with the M90 propelling charge. . Close approach to crests, trees, towers, large buildings, parked aircraft, mechanized equipment, and similar irregularities causes functioning at heights greater than average level. An ammunition lot number is assigned to each ammunition lot, which is marked on each cartridge and packing container. b. .50: AP, M2 AND CARTRIDGE, CAL. The term "danger close" is included in the call for fire when there are friendly troops or positions within a prescribed distance of the target, specifically 600 meters for artillery or mortars . The gunner then kicks the barrel several times with his heel in an attempt to dislodge the round. d. The gunner removes the sight from its case, mounts it on the mortar, and sets a deflection of 3200 mils and an elevation of 1100 mils. a. Before-firing checks include the following: (1) Ammunition should be free of moisture, rust, and dirt. Safety before firing is provided by a safety wire, which must be removed just before firing. An air cavity can form on one side of a cartridge to unbalance it, causing instability in flight. Cartridges assembled with the M524 (A1, A2, A3, or A4) fuze are for use by the U.S. Marine Corps and U.S. Navy only. Home; Swifty. Additional information is included on an ammunition data card inside each container. a. He indicates the initial direction of fire by pointing in that direction and commands ACTION. High angles of approach (near vertical) give the lowest burst heights. Table 4-2. The explosive elements in primers and fuzes are sensitive to shock and high temperature. If it is necessary to leave the ammunition uncovered, it should be raised on dunnage at least 6 inches above the ground. The components of the mortar consist of a canon, sight, mount, and baseplate. The striker has been modified to be able to use German and Italian patterns of 81mm mortar . 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 . High explosive is used for both fragmentation and blast effect against personnel and light-skinned vehicles. These are NDI items . Correct way to open an ammunition box. Barrel (with blast attenuator device) The fuze contains a delayed arming feature that ensures the fuze remains unarmed and detonator safe for a minimum of 1.25 seconds of flight. The fuze setter, M25, sets M84-series time fuzes. 4-4. The M252 system . .30 BROWNING, M1917 AND M1917A1; GUN, MACHINE, CAL. The second ammunition bearer retrieves the aiming posts. Figure 4-7. d. The ammunition is protected from mud, sand, dirt, and water. The cannon has a crew-removable breech plug and firing pin. b. (2) Color code. Table 4-1. Overhead interference can be branches of trees or roofs of buildings. The M751 fuze is the only dummy fuze used with the 81-mm mortar. a. Bear in mind that these are my personal opinions, experiences, and . Each round is stenciled with the ammunition lot number, type of round, type of filler, and caliber. b. d. Multioption. The mount consists of elevating and traversing mechanisms and a bipod (Figure 4-4). He releases the securing strap, loosens the leg-locking handwheel, and lowers the plain leg until the locating catch engages in the recess. After the rounds have been removed, they should always be handled with two hands to prevent accidental dropping. (a) Since the mortar is normally mounted in defilade, there could be a mask such as a hill, tree, building, or rise in the ground. c. Upon receiving the command REFER, REALIGN AIMING POST, two actions take place at the same time in the mortar squad. Each squad member should be able to perform all the following premount checks: a. Complete cartridges are always handled with care. The fuze arms and functions normally when fired at any angle of elevation between 0800 and 1406 mils at charges 1 through 9. Swifty 3 from scratch; Swifty 3 split-repo setup; Swifty Troubleshooting; Mods. a. The barrel clamp, which consists of an upper and lower clamp, is situated at the top. He performs other duties as the squad leader directs. d. The gunner recovers the baseplate to the area designated by the squad leader. 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. b. The standard infantry support weapon is the M-252 81mm mortar, which lobs a 10 lb. The entire squad stays with the mortar. He exposes 4 inches (100 millimeters) of elevation shaft and folds the handle. The M301A3 cartridge has a cylindrical body that contains an illuminating candle and parachute assembly. 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. Mount, M177, in folded position. c. Authorized Cartridges. Tabulated data. .50 MACHINE GUN, M3; FIRING CARTRIDGE, CAL. The table on the right describes the three most common setups. Theme by TechDoc. Safety before firing is provided by a safety wire, which must be removed just before firing. He opens the cross-level handwheel, traversing handwheel, and barrel clamp. c. Mechanical Time. The cartridge must not be fired below charge 3. The M29 would become the standard American mortar in the upcoming Vietnam War. The company level vehicles also carry a vehicle-mounted 120mm mortar, which is augmented by the 60mm M224 mortar for dismounted use. a. The safety pull wire is removed just before inserting the cartridge into the mortar. Several types of RP/WP ammunition are described herein. It uses the M219 propelling charge and weighs about 9.1 pounds. The assistant gunner carries the bipod to the front of the barrel and places the bipod feet on the ground 12 to 15 inches in front of the baseplate and astride the line of fire. In addition to loading, he swabs the bore after 10 rounds have been fired or after each fire mission. All rounds are colored according to their type. It can be fitted with either the M567, M524, or M532-series fuzes. If the line of sight clears the mask, it is safe to fire. a. MFCS Dismounted. When the gunner is satisfied with his sight picture he announces, "Up.". It is painted white with black markings. c. Crest Clearance. During training, the gunner may use the driving stake from the aiming post case. These cartridges are used first in subsequent firing so that once-opened stocks can be kept to a minimum. The 81-mm mortar, M252, is a smooth-bore, muzzle-loaded, high-angle-of-fire weapon. Both the 60mm and 120mm mortar rounds use White Phosphorus. If the mortar section is to operate quickly and effectively in accomplishing its mission, mortar squad members must be proficient in individually assigned duties. The squad leader stands behind the mortar where he can command and control his squad. The components of the mortar consist of a cannon, mount, and baseplate. (3) The M256-series fuze has an SQ/IMP function only. e. The second ammunition bearer stands to the right rear of the mortar behind the ammunition bearer. With standard mortar, the maximum effective range is close to 4,000 metres; with a long-range system, this increases to nearly 4,500 metres. . It contains white phosphorus that produces white smoke on contact with air. 0.50, M8 (REPRINTED W/BASIC INCL C1-2) (S&I BY PROP SEE DETAILS, FOOTNOTES), FIRING TABLES FOR MACHINE GUN, CALIBER .50: BROWNING, M2 (HEAVY BARREL, TURRET TYPE) ON MOUNT, MACHINE GUN, TRAILER MOUNTED: MULTIPLE CALIBER .50 MACHINE GUN, M55 FIRING CARTRIDGE, CALIBER .50: API, M8 (S&I BY PROP SEE DETAILS, FOOTNOTES), FIRING TABLES FOR MACHINE GUN, CALIBER .50: FICED, M85 TANK, COMBAT, FULL TRACKED: 105MM GUN, M60 SERIES FIRING CARTRIDGE, CALIBER .50: API, M8 CARTRIDGE, CALIBER .50: API-T M20 CARTRIDGE, CALIBER .50: BALL, M33 CARTRIDGE, CALIBER .50: TRACER, M17 (S&I BY PROP SEE DETAILS, FOOTNOTES), MACHINE GUN, CAL. Notches in the setter engage ribs in the setting ring of the fuze. The squad leader points to the exact spot where the mortar is to be mounted. If the round fires, the mortar is re-laid on the aiming point and firing is continued. The tabulated data of the 81-mm mortar, M252, are shown in Table 4-1. e. The assistant gunner passes the round to the first ammunition bearer who inspects it for the cause of the misfire. It has two types: type 1 resembles the M734 fuze, and type 2 resembles the M935 fuze. (1) The M935 fuze has two function settings: impact and delay. Finally, the assistant gunner loosens the leg-locking handwheel, presses the spring-loaded locating catch, and raises the plain leg behind the buffer cylinders until it touches the traversing handwheel. Target terrain, such as ice and dry sand, gives lowest burst heights, whereas water and wet ground give highest burst heights. Section I. Remaining increments are repositioned towards the rear of the tail fin assembly when firing the cartridge with horseshoe-shaped increments at less than full charge. The aluminum tail assembly has six integral fins equally spaced around the rear, which stabilize the round in flight. b. Its range and explosive power is greater than the M224, yet it is still light enough to be man . Check the post SOP before applying the following procedure: (1) Select a place at least 100 meters from the mortar position, parked vehicles, and ammunition piles. An M18 fuze wrench is used to change settings. If not, the cartridge is placed on its side, and the closing plug is removed using an M18 fuze wrench. The wrench (P/N 9349539) sets M772 MT and M768 time fuzes. (3) From this train, extend a starting train that will burn against the wind of single increments laid end to end. M327 mortar is an extended range mortar system operated by Marine Corps Artillery Units. The air burst over average types of soil ranges from 1 to 6 meters, depending on the angle of approach. The superior flow characteristics of these BALL POWDER . Increments removed from cartridges before firing should be placed in a metal or wooden container located outside the firing vehicle/position at least 25 meters away. Upon completion of any bipod movement on the barrel, the gunner ensures that the firing pin recess is facing upward. 1:4 For the 81MM Mortar System: X NSN (LIN): 1015-01-441-3113 : STAFF SECTION, CLEANING, ARTILLERY 1:4: 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. In addition to supervising the emplacement, laying, and firing of the mortar, he supervises all other squad activities. c. After the gunner has announced, "Up," the squad leader should check the mortar to determine if the exercise was performed correctly.

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