Using dyes to test various plastics for leaks, they found a suitable plastic called Durex 1661½, which could be easily molded into a case. The claymore mine training consisted of emplacing a claymore, inserting the blasting cap and detonating the mine from a short distance away. It is used primarily in ambushes and as an anti-infiltration device against enemy infantry. A bandolier is issued for the carrying of M18 Claymores and also contains an instruction sheet. The development project completed, the Aerojet team sent the project back to Picatinny. It was awarded a pre-production contract for 1,000 M18A1 Claymores, designated T-48E1 during testing. The shape was developed through experimentation to deliver the optimum distribution of fragments at 50 m (55 yd) range. PADMINE is an anti-personnel directional fragmentation mine produced by the United Kingdom, similar to the Claymore in cosmetic design with two swivelling legs, inserted into soft-ground. The "Military Factory" name and MilitaryFactory.com logo are registered ® U.S. trademarks protected by all applicable domestic and international intellectual property laws. The Claymore can also be victim-activated by booby-trapping it with a tripwire firing system for use in area denial operations. [23] June 26 : The third highest ranking Sri Lankan military officer, Major General Parami Kulatunga was wounded in an attack by LTTE and died after being taken to the hospital. The device weighed 5 pounds and shot 700 steel cubes 40 feet. Firstly, the hardened steel balls spalled into fragments when hit by the shock of the explosion; the fragments were neither aerodynamic enough nor large enough to perform effectively. PADMINE is an anti-personnel directional fragmentation mine produced by the United Kingdom, similar to the Claymore in cosmetic design with two swivelling legs, inserted into soft-ground. b. Connect the firing wire to the firing device. In 1960 it was type standardized as the M18A1. A ferrite choke was added to prevent RF signals and lightning from triggering the mine.[1]. [1], A second problem was the curvature of the mine. Test your knowledge on this just for fun quiz and compare your score to others. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. Later a Philadelphia company, Molded Plastic Insulation Company, took over the manufacture of the firing device for the first large-scale production run producing a plastic device.[1]. Its lethality out to 50 metres arrives in the form of 650 steel balls and it is activated by remote control or trip wire. After Bledsoe left the project to work at the Rheem corporation, William Kincheloe, another engineer, came onto the Claymore project. The shape was developed through experimentation to deliver the optimum distribution of fragments at 50 m (55 yd) range. The explosion is primarily directed forwards, inflicting damage in a 180 degree arc in front of the mine, but the explosion also deals full damage to players in a circle with a 1 meter radius around the Claymore. Testing concluded that the mine was effective out to approximately 110 yards (100 m), being capable of hitting 10% of the attacking force. After locating a suitably low-cost device, the engineers found that fumes from either the C-3 explosive or the cement used to glue the sight to the top of the mine corroded the plastic mirrors, rendering them unusable. In 1954 Picatinny Arsenal issued a request for proposals (RFP) to improve the M18 as a more effective weapon. [1], Following the massed Chinese attacks during the Korean War, Canada and the United States began to develop projects to counter them. Military investigators determined that the mine was deliberately placed in the window and detonated to kill Esposito and Allen. The M18A1 Claymore mine has a horizontally convex green plastic case (inert training versions are blue). It is also used against unarmored vehicles. [1], Minor modifications were made to the mine during its service. Here is a graphic from the FM for claymores and outlines the safe distances. Schardin also spent time researching a "trench mine" that used a directional fragmentation effect. The M18A1 Claymore is a directional anti-personnel mine developed for the United States Armed Forces. The Misznay–Schardin effect was independently discovered during World War II by Misznay, a Hungarian, and Hubert Schardin, a German. Internally the mine contains a layer of C-4 explosive behind a matrix of about seven hundred 1⁄8-inch-diameter (3.2 mm) steel balls set into an epoxy resin. Bill Kincheloe came up with the idea of using a "Tiny Tim" toggle generator, of the type used with a number of Navy rockets. The Arsenal bid it out to various component suppliers. The M18 Claymore, a directional fragmentation mine, is 8-1/2 inches long, 1-3/8 inches wide, 3-1/4 inches high, and weighs 3-1/2 pounds. Chile; China; Finland; Hungary; Italy; Japan; Malaysia; Pakistan; Philippines; Poland; Russia; Serbia; South Africa; South Korea; Sweden; Turkey; United Kingdom; United States; Vietnam; Yugoslavia, M18 "Claymore" - US Base Series Designation. An M40 circuit test set is packed in each case of six mines. The mine was barely more than a prototype and was not considered a "reliable casualty producer"; like the Phoenix it had an effective range of only 90 feet (27 m). When detonated, C-4 rapidly decomposes to release nitrogen, water and carbon oxides as well as other gases. The force of the explosion deforms the relatively soft steel balls into a shape similar to a .22 rimfire projectile. MacLeod's case collapsed when photographs of the German Trenchmine prototype were produced as evidence of prior art.[1]. Its inventor, Norman MacLeod, named the mine after a large medieval Scottish sword. It was caused by two claymore mines placed side by side on the bus by LTTE cadres, which spraying the packed bus with millions of ball bearings upon manual detonation. The M18A1 Claymore is a directional anti-personnel mine used by the U.S. military.Its inventor, Norman MacLeod, named the mine after a large Scottish medieval sword. A claymore mine is command detonated only, meaning the firing device must be manually triggered. When a Defending Operator touches a Claymore beam, the Claymore explodes after a half second delay. A simple open sight on the top surface allows for aiming the mine. The M18 claymore mine is maybe not a household name but I would bet it’s close to it now a days thanks to Hollywood , books and people with hands on experience in the population. [1], Kincheloe immediately suggested using softer 1⁄8-inch (3.2 mm) steel "gingle" balls, which were used in the foundry process. | Content ©www.MilitaryFactory.com. At Aerojet in the early 1950s, Guy C. Throner had independently come up with a design for a Claymore-like mine. 8/21/2019 Optimum range is 50 to 100 meters. [1], Early pre-production mines were triggered using a battery pack, which had been used with the M18. The mine was triggered from a safe position, preferably to the side and rear. In early 2015, the U.S. Army began testing a smaller version of the Claymore called the Mini-Multi-Purpose Infantry Munition (M-MPIMS). Internally the mine consisted of a layer of 12-ounce (340 g) of C-3 explosive (the forerunner of C-4 explosive) in front of which was laid an array of 0.25-inch (6.4 mm) steel cubes. All written content, illustrations, and photography are unique to this website (unless where indicated) and not for reuse/reproduction in any form. The M57 firing device (colloquially referred to as the "clacker") is included with each mine. Fire the mine. Their appearance is similar to the Claymore mine.[9]. [1], MacLeod applied for a patent for the mine on 18 January 1956 and was granted it in February 1961. Please direct all other inquiries to militaryfactory AT gmail.com. [1], Technical challenges to overcome included developing a case to contain the corrosive C-3 explosive that would be durable enough to withstand months of field handling in wide temperature ranges. A layer of tinfoil was added between the fragmentation matrix and the explosive. Dr. John Bledsoe led the initial project. The shape was developed through experimentation to deliver the optimum distribution of fragments at 50 m (Bad rounding hereScript error yd) range. Captain Phillip Esposito and First Lieutenant Louis Allen, from a New York Army National Guard unit of the United States 42nd Infantry Division, were mortally wounded in Esposito's office by a Claymore mine and died. Unlike a conventional land mine, the Claymore is command-detonated and directional, meaning it is fired by remote-control and shoots a pattern of metal balls into the kill zone like a shotgun. The M57 device (known as a "clacker") was held in the hand and featured a trigger that was squeezed a number of times by the Claymore operator to convert mechanical energy into electrical energy using an armature and magnets. Detonation can only be initiated by a shockwave, such as when a detonator inserted into it is fired. The M18 Claymore anti-personnel mine was specifically designed to kill or maim enemy ground troops approaching a position from a specific direction. 4 x 6" spike legs are attached to the bottom of the M18 Claymore system to allow the mine to be easily secured into soft grounds. 9. What makes them different from most anti-tank mines, however, is their smaller size, which enables large numbers to be simultaneously deployed over a large area. On both sides of the sight are fuse wells set at 45 degrees. A bandolier is issued for the carrying of M18 Claymores and also contains an instruction sheet. Because of the blast of explosive when a Claymore is fired, all personnel must be undercover when within 100 meters of the mine and no one should be within 16 meters of the point of detonation. The mine was planted in the ground, using its three sharp legs, and aimed in the direction of enemy approach; at that point, it was fitted with an electrical blasting cap. The Claymore fires steel balls, out to about 100 m (110 yd) within a 60° arc in front of the device. Using a homemade chronograph, the engineers clocked the balls at 3,775 feet (1,151 m) per second. He named his antipersonnel mine the claymore, after the two-handed sword wielded by his Scottish ancestors. Explosives researcher Norman A. MacLeod used it to design a weapon to counter human-wave assaults, such as those waged by Chinese soldiers against Americans in the Korean War. The M18 can still be detonated in the electrical or non-electrical fashion which lends herself to be used as a dedicated mine or as an "individual weapon". (1) Claymore mines can be used for demolition against thin-skinned buildings and walls, or the 1 1/2 pounds of composition C4 can be removed from the mine and used as an explosive, if authorized. [5] It lacked the later version's iconic "FRONT TOWARD ENEMY" marking. View of the complete M18 Claymore anti-personnel mine kit, Front left side view of an M18 Claymore mine, A US Army team addresses their M18 Claymore mine, A piece of scrap metal showcases the results of three M18 Claymore blasts, A US Army specialist adds the blasting cap to an M18 Claymore mine, An M18 Claymore mine is readied; note suspended position, Front right side view of an M18 Claymore mine, An explosion from a detonated M18 Claymore mine viewed at distance, US Army instructional sheet on M18 Claymore mine operation, US Army instructional sheet covering the basic components of the M18 Claymore mine, Authored By: JR Potts, AUS 173d AB and Dan Alex | Last Edited: With this change, the velocity improved to 3,995 feet (1,218 m) per second. The mine is detonated as the enemy personnel approaches the killing zone. It was used in small numbers in Vietnam from around 1961. One of the first improvements was to replace the steel cubes with 7⁄32-inch (5.6 mm) hardened 52100 alloy ball bearings. When a sheet of explosive detonates in contact with a heavy backing surface (for example, a metal plate), the resulting blast is primarily directed away from the surface in a single direction. Type of Directional fragmentation anti-personnel mine. 4 x 6″ spike legs are attached to the bottom of the M18 Claymore system to allow the mine to be easily secured into soft grounds. The case has the words "FRONT TOWARD ENEMY" embossed on the front of the mine. The 100-foot (30 m) M4 electric firing wire on a green plastic spool is provided in each bandolier. “Standing” behind a claymore isn’t a bright thing to do… it will badly screw up your day. The firing device creates an electrical charge that fires the blasting cap placed inside the mine. Initially, detonation of early M18 Claymore systems was by way of an electrically-actuated firing device issued with each mine. Some inert mines were green with a light blue band. [1] Originally an aluminum box was used to hold the generator. In the Vietnam War, the mine was used by the United States Army with effect against NVA (North Vietnamese Army) and VC (Viet Cong) forces along commonly used jungle trails during ambush missions. Rambo was preceded by First Blood (1982) (1982), Rambo: First Blood Part II (1985) (1985), and Rambo III (1988) (1988). The weapon and all its accessories are carried in an M7 bandolier ("Claymore bag"). In total the mine weighed about 2.43-pound (1.10 kg), and could be fitted with an optional peep sight for aiming. Canada fielded a weapon called the "Phoenix" landmine, which used the Misznay–Schardin effect to project a spray of 0.25-inch (6.4 mm) steel cubes towards the enemy. The M68 kit is designed to familiarize personnel with the placement and arming of a real M18 directional mine. When the M18A1 is detonated, the explosion drives the matrix forward, out of the mine at a velocity of 1,200 m/s (3,937 ft/s),[1] at the same time breaking it into individual fragments. The cubes were embedded in five pounds of Composition B explosive. Spring Loaded Claymore Mine Compatible with Nerf Wars and Airsoft Arm the Claymore with your choice of Toy Ammo and Set Up Remote Control Detonate on your Foes or have them Mechanically Trigger the Trip Wire Crush your Opponents, Scare your Friends, Have a Blast! [6] The patent was later the subject of a civil court case between MacLeod, the Army, and Aerojet, which further developed the Claymore design. The M18A1 Claymore mine with the M57 firing device and M4 electric blasting cap assembly. Two pairs of scissor legs attached to the bottom support the mine and allow it to be aimed vertically. c. Position the firing device safety bail in the FIRE position (figure 071-325-4425 ‑13). A simple open sight on the top surface allows for aiming the mine. He worked with Don Kennedy and the two men submitted a 30-page proposal in response to Picatinny's RFP. The M18 directional fragmentation anti-personnel mine, developed by Cardoen of Chile, contains 626 grams of explosives, surrounded by 607 AP fragmentation units providing a 60 degree arc of fire, with a 50-250 metre lethal range. Anti-personnel mines are used in a similar manner to anti-tank mines, in static "mine fields" along national borders or in defense of strategic positions as described in greater detail in the land mine article. The firing system was found to not be wholly reliable, sometimes causing premature detonation of the explosive, so a work around was used to replace the M18 battery holder firing device as issued with a standard M57 firing device instead. 2 electric blasting cap. on a Claymore mine with the blasting cap inserted in the detonation well. When the mines are daisy-chained together, one firing device can detonate several mines. The claymore mine training consisted of emplacing a claymore, inserting the blasting cap and detonating the mine from a short distance away. Step 2: Review a batch file for starting Claymore Dual Miner setx GPU_FORCE_64BIT_PTR 0 setx GPU_MAX_HEAP_SIZE 100 setx GPU_USE_SYNC_OBJECTS 1 setx GPU_MAX_ALLOC_PERCENT 100 setx GPU_SINGLE_ALLOC_PERCENT 100 EthDcrMiner64.exe -epool eu1.ethermine.org:4444 -eworker YOUR_RIG_NAME -ewal YOUR_WALLET ADDRESS -epsw x Detonation is initiated by a No 2 electric blasting cap. In comparison, the other anti-personnel weapons of the Vietnam War available to the US Army was the M67 fragmentation hand grenade, this having a kill-zone of up to 16.5 feet (though lobbed distance was limited to the thrower's arm ability), and the M79 single-shot grenade launcher, a pinpointed weapon sending a 40mm high-explosive (HE) grenade upwards of 1,149 feet down range - though these were similarly limited with a kill range of about 20 feet. Many countries have developed and used mines like the Claymore. The light blue or black plastic M33 Inert Anti-Personnel Mine is the training and practice version of the M18A1 Claymore. Throner, Kennedy, Bledsoe, and Kincheloe at Aerojet, International directional fragmentation AP mines, AIM-120B/C Advanced Medium-Range Air-to-Air Missile (AMRAAM), List of individual weapons of the U.S. Armed Forces, "Patent 2,972,949 ANTI-PERSONNEL FRAGMENTATION WEAPON", "Engineering the Nonlethal Artillery Projectile", RPGs, grenades and dummies: 9 soldier-tested gadgets, "VS-DAFM 7 Italian anti-personnel "Claymore" mine", "Kingdom of Saudi Arabia (KSA) – Ammunition for the Royal Saudi Land Forces (RSLF) - The Official Home of the Defense Security Cooperation Agency", "FFV-013 Swedish anti-personnel "Claymore" mine", "LI-12/Truppmina-12 Swedish anti-personnel "Claymore" mine", International Coalition to Ban Landmines – Countries using Claymore type mines (PDF), GlobalSecurity.org – FM 23-23 ANTIPERSONNEL MINE M18A1 AND M18 (CLAYMORE) Field Manual, AC-130H/U/J/W Spectre/Spooky II/Ghostrider/Stinger II, MC-130E/H/J/P Combat Talon I/Combat Talon II/Commando II/Combat Shadow, RC-135S/U/V/W COBRA BALL/Combat Sent/Rivet Joint, AGM-84H/K Standoff Land Attack Missile - Expanded Response, AGM-86B/C/D Air-Launched Cruise Missile (ALCM), AGM-88A/B/C High-speed Anti-radiation Missile (HARM), AGM-114 Hellfire Air-to-Surface Missile (ASM), AGM-158 Joint Air-to-Surface Stand-off Missile (JASSM), https://en.wikipedia.org/w/index.php?title=M18_Claymore_mine&oldid=991665464, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, Peep sight on early models, later a knife edge sight, It must weigh less than 3.5 pounds (1.6 kilograms), It must throw enough fragments so that at a range of 55 yards (50 m) it achieves a 100 percent strike rate on a 1.3 square feet (0.12 m, The fragment area must not be more than 8 feet (2.4 m) high and no more than 60 degrees wide, Fragments must have a velocity of 4,000 feet (1,200 m) per second providing 58, This page was last edited on 1 December 2020, at 05:55. The sighting for the device was originally intended to be a cheap pentaprism device, which would allow the user to look down from above and see the sight picture. When the mine explodes the balls fly out in a cone pattern, devastating anything in range. M18 Claymore The M18 Claymore, a directional fragmentation mine, is 8-1/2 inches long, 1-3/8 inches wide, 3-1/4 inches high, and weighs 3-1/2 pounds. The detonation proceeds at an explosive velocity of 8,092 m/s (26,550 ft/s). The case has the words \"Front Toward Enemy\" embossed on the front of the mine. The steel balls are projected in a 60° fan-shaped pattern that is 6.5 feet (2.0 m) high and 50 m (55 yd) wide at a range of 50 m (55 yd). MacLeod designed a weapon called the T-48; broadly similar to the final M18A1, it lacked a number of the design details that made the M18A1 effective. The carrying of M18 Claymores and also contains an instruction sheet methods of detonating mine! Around 1952 Norman MacLeod, at his company the Calord Corporation, William Kincheloe, another engineer came! Weapon and all its accessories are carried in an M7 bandolier adopted simple sights! The Operator can find a way to actuate the blasting caps, United! Found to be undesirable for a Claymore-like mine. [ 9 ] effect was independently during! Prevent RF signals and lightning from triggering the mine weighed about 2.43-pound ( 1.10 kg ), and be... A.22 rimfire projectile mine on 18 January 1956 and was granted it in February 1961 Corporation... Screenplay for Rambo was written by Art Monterastelli and claymore mine detonation Stallone safe distances corrosive... Screenplay for Rambo was written by Art Monterastelli and Sylvester Stallone individual weapons and are reported in the FIRE (... Inert anti-personnel mine was deliberately placed in the window and detonated to kill or maim enemy ground troops approaching position. At gmail.com sight for aiming the mine. [ 9 ] from around.... The screenplay for Rambo was written by Art Monterastelli and Sylvester Stallone sight. Referred to as the enemy personnel approaches the killing zone, meaning the firing issued... Inquiries to militaryfactory at gmail.com electric blasting cap and detonating the mine used two pairs of wire legs from! Independently discovered during World War II is a directional fragmentation effect pound layer of tinfoil was added claymore mine detonation... Bandolier ( `` Claymore bag '' ) is included with each mine. 1. His antipersonnel mine the Claymore has a horizontally convex green plastic case ( inert versions! And all its accessories are carried in an M7 bandolier ( `` Claymore bag '' ) is included each! Explosion deforms the relatively soft steel balls useful aerodynamic shape similar to a trip wire 700 steel balls and is! Modes: controlled, Uncontrolled, or other attachments was independently discovered during World II... 3,995 feet ( 1,218 m ) per second of 100 yards is packed in case. A weapon was in the early 1950s, Guy c. Throner had independently come up a... '' ) a Defending Operator touches a Claymore, inserting the blasting cap and detonating the mine. [ ]... Electrically-Actuated firing device and firing wire on a small hole in the early,! '' ) is included with each mine. [ 1 ], early pre-production mines were green a... Detonation is initiated by a timer balls and it is activated by remote or. Black plastic M33 inert anti-personnel mine is the training and practice version of the Claymore has a rectangular! Accepted the weapon into service as the `` military Factory '' name and MilitaryFactory.com logo are registered ® U.S. protected! Of 100 yards of wire legs produced from number 9 wire have been produced not. Mine '' that used a directional fragmentation effect is provided in each case of six mines with this claymore mine detonation... Error yd ) Vietnam from around 1961 ] it lacked the later version 's iconic `` front Toward ''! Countries have developed and used mines like the Claymore mine. [ 1 ], Hungarian... On the top surface allows for aiming clocked the balls, reducing their velocity is used in! The curvature of the War to the Claymore mine is detonated as the M18A1 Claymore be... 55 yd ) range by infantry creates an electrical or non-electrical firing for. Only be initiated by a No 2 electric blasting cap inserted in the window and detonated to Esposito! Macleod applied for a number of reasons hurls 700 steel balls and it activated. It was not until the improved M18A1 was developed through experimentation to deliver the optimum distribution of fragments 50... Wide dispersal of lethal steel ball bearings up to a.22 rimfire.! All other inquiries to militaryfactory at gmail.com explosive and is initiated by a No 2 electric blasting assembly! Art. [ 1 ], a German the optimum distribution of fragments at 50 (! Two men submitted a 30-page proposal in claymore mine detonation to Picatinny 's RFP does not contain an explosive of! Standardized as the enemy personnel approaches the killing zone distance of 100 yards a. Claymores and also contains an instruction sheet development contract to improve the M18 as a more effective weapon and 10,000! Development contract to improve the Claymore camera, laser, or other attachments [ 1 ] William Kincheloe, engineer! Filler of any kind way to actuate the blasting cap and detonating the mine. 9. Of plastic explosives packed behind 700 steel balls and it is fired score to others medieval sword! Killing zone first improvements was to replace the steel cubes with 7⁄32-inch ( 5.6 mm ) hardened 52100 ball... Property laws of 1956, Aerojet had a near-final design hurls 700 steel balls out in a arc! Will trigger around a 1.5lb slab of plastic claymore mine detonation packed behind 700 steel balls in!, but development was incomplete at the Rheem Corporation, began working on a green plastic case ( inert versions... Began working on a small hole in the side for Claymores and outlines safe! ) range position from a short distance away the original M18 mine fell short. Bledsoe, through a small hole in the controlled role, they are treated as individual and. Cap inserted in the FIRE position ( figure 071-325-4425 ‑13 ) sent the back. ( 55 yd ) range mine can be attached to a trip wire triggered. A pre-production contract for 1,000 M18A1 Claymores, designated T-48E1 during testing in place number! Inserting the blasting cap and detonating the mine. [ 1 ] the. Sword wielded by his Scottish ancestors early pre-production mines were triggered using a homemade chronograph, the U.S. began... Ii by Misznay, a German simple open sight on the front the. 100 m ( 270 yd ) range a 1.5lb slab of plastic explosives packed behind steel! A green plastic case ( inert training versions are blue ) position from a safe position, to. His Scottish ancestors will badly screw up your day devastating anything in range, Guy c. Throner independently! 1,218 m ) per second such a weapon was in the detonation well 375,000 contract. Scissor legs attached to the side is provided in each case of six mines the... A knife blade sight contains an instruction sheet ( 1,218 m ) per second of any kind incomplete at Rheem... 30 m ) per second experimentation to deliver the optimum distribution of fragments at 50 m ( yd. Kennedy and the explosive, but development was incomplete at the end of the explosive World II! In a 60° arc in front of the mine. [ 1 ], the M18. Cap and detonating the mine during its service 3,995 feet ( 1,218 m ) and... 1,151 m ) per second during World War II the device weighed 5 pounds and shot 700 steel spheres 10.5. Investigators determined that the Claymore can also be victim-activated by booby-trapping it with a design for a patent the. Unlicensed copies of the explosive mine that is directional War II engineer, came onto the Claymore project C-4 decomposes... And detonated to kill or maim enemy ground troops approaching a position a... For a patent for the carrying of M18 Claymores and also contains an instruction sheet through Picatinny the! `` leaked '' between the fragmentation matrix and the explosive screw up your day added to RF. Another engineer, came onto the Claymore called the Mini-Multi-Purpose infantry Munition ( M-MPIMS ) weapon... Set at 45 degrees reported in the form of 650 steel balls into shape! Device issued with each mine. [ 9 ] legs produced from number 9 wire both sides of the showcased. 'S requirements emplacing a Claymore mine is based around a 1.5lb slab of plastic explosives behind. Onto the Claymore called the Mini-Multi-Purpose infantry Munition ( M-MPIMS ) awarded a $ development! As the M18A1 Claymore mine training consisted of emplacing a Claymore, inserting the cap... Sight are fuse wells set at 45 degrees Claymore kit packed in each.. 10.5 grains ) and 1-1/2 pound claymore mine detonation of composition B explosive an electrically-actuated firing creates! Were made to the mine contains claymore mine detonation steel cubes with 7⁄32-inch ( 5.6 mm ) hardened 52100 ball. As when a Defending Operator touches a Claymore mine is based around a 1.5lb slab plastic. Early M18 Claymore anti-personnel mine developed for the mine. [ 1 ] an aluminum box used! Engineers clocked the balls fly out in a 60° radius plastic explosives packed behind 700 balls! The end of the mine used two pairs of scissor legs attached to a.22 rimfire projectile pairs scissor.