View source for Claymore mine

{{short description|American directional anti-personnel mine}}
{{redirect|Front Toward Enemy|the episode of ''The Punisher''|Front Toward Enemy (The Punisher){{!}}Front Toward Enemy (''The Punisher'')}}
{{Infobox weapon
| name            = Claymore mine
| image           = US M18a1 claymore mine.jpg
| image_size      = 300
| caption         = The M18A1 Claymore mine with the M57 firing device and M4 electric blasting cap assembly.
| origin          = United States
| type            = Directional fragmentation [[anti-personnel mine]]
<!-- Type selection -->
| is_ranged       = yes
| is_explosive    = yes
<!-- Service history -->
| service         = 1960–present
| used_by         = United States, United Kingdom, Denmark
| wars            = {{plainlist|
*[[Vietnam War]]
*[[Korean conflict]]
*[[Cambodian Civil War]]
*[[Soviet–Afghan War]]
*[[Iraq War]]
*[[Gulf War]]
*[[Operation Protective Edge]]
*[[Bosnian War]]
*[[Rhodesian Bush War]]
*[[War in Afghanistan (2001-2021)|War in Afghanistan]]
*[[Sri Lankan civil war|Sri Lankan Civil War]]
*[[Myanmar civil war (2021–present)|Myanmar Civil War]]
*[[Russian invasion of Ukraine]]}}
<!-- Production history -->
| designer        = Norman Macleod and others
| design_date     = 1952–1956
| manufacturer    = Mohawk Electrical Systems
| unit_cost       = [[US Dollars|$]]119 as of 1993<ref name="Grupp" />
| production_date = 
| number          = <!-- General specifications -->
| spec_label      = 
| weight          = {{convert|3.5|lb|abbr=on}}
| length          = {{convert|216|mm|abbr=on|order=flip}}
| part_length     = 
| width           = {{convert|38|mm|abbr=on|order=flip}}
| height          = {{convert|124|mm|abbr=on|order=flip}}
| diameter        = 
| crew            = <!-- Ranged weapon specifications -->
| caliber         = .125, or {{frac|1|8}}-inch (3.2&nbsp;mm) diameter steel balls, about 700 per unit
| velocity        = {{convert|3,995|ft/s|m/s|abbr=on}}
| range           = {{convert|50|m|ft|abbr=on|order=flip}}
| max_range       = {{convert|250|m|ft|abbr=on|order=flip}}
| sights          = Peep sight on early models, later a knife edge sight
<!-- Explosive specifications -->
| filling         = [[C-4 (explosive)|C-4]]
| filling_weight  = {{convert|680|g|abbr=on|order=flip}}
| detonation      = Blasting Cap Assembly M4<ref>{{cite book |title=Operator's and Unit Maintenance Manual for Landmines TM 9-1345-203-12 |url=http://mines.duvernois.org/LandMines.pdf |date=October 1995 |publisher=Headquarters, Department of the Army |location=Washington, D.C. |pages=1–8 |access-date=May 19, 2015 |via=mines.duvernois.org |archive-url=https://web.archive.org/web/20150521141558/http://mines.duvernois.org/LandMines.pdf |archive-date=May 21, 2015 |url-status=dead}}</ref>
| yield           = 
}}

The '''Claymore mine''' is a directional [[anti-personnel mine]] developed for the [[United States Armed Forces]], invented by Norman MacLeod. Unlike a conventional land mine, the Claymore may be command-detonated (fired by remote-control), and is directional, shooting a wide pattern of metal balls into a [[kill zone]]. The Claymore can also be activated by a booby-trap tripwire firing system for use in [[Area denial weapon|area denial operations]].

The Claymore fires steel balls out to about {{convert|100|m|ft|abbr=on|order=flip|sigfig=1}} within a 60° arc in front of the device. It is used primarily in [[ambush]]es and as an anti-infiltration device against enemy [[infantry]]. It is also used against [[soft-skinned vehicle|unarmored vehicles]].

Many countries have developed and used mines like the Claymore. Examples include models [[MON-50]], [[MON-90]], [[MON-100]], and [[MON-200]] introduced by the Soviet Union and used by its successor Russia,<ref>{{cite news| last=Boffey | first=Daniel | title='You don't survive that': Ukraine sappers dice with death to clear Russian mines |newspaper=The Guardian | date=13 August 2023 | url=https://www.theguardian.com/world/2023/aug/13/ukraine-sappers-mine-clearers-russia-war}}</ref> as well as [[MRUD]] (Serbia), [[MAPED F1]] (France), and [[Mini MS-803 mine|Mini MS-803]] (South Africa).

== Description ==
The M18A1 Claymore mine has a horizontally convex gray-green plastic case (inert training versions are light blue or green with a light blue band). The shape was developed through experimentation to deliver the optimum distribution of fragments at {{convert|50|m|ft|abbr=on|order=flip}} range. The case has the words "FRONT TOWARD ENEMY" embossed on the front of the mine.<ref>FM 3–21.75 Ch. 14</ref> A simple open sight on the top surface allows for aiming the mine. Two pairs of scissor legs attached to the bottom support the mine and allow it to be aimed vertically. On both sides of the sight are fuse wells set at 45°.

Internally the mine contains a layer of [[C-4 (explosive)|C-4 explosive]] behind a matrix of about seven hundred {{convert|1/8|in|mm|0|adj=mid|-diameter}} steel balls set into an [[epoxy resin]].

When the M18A1 is detonated, the explosion drives the matrix forward, out of the mine at a velocity of {{convert|1200|m/s|abbr=on|order=flip}},<ref name="Grupp" /> at the same time breaking it into individual fragments. The steel balls are projected in a 60° fan-shaped pattern {{convert|2|m|ft|0|order=flip}} high and {{convert|50|m|ft|abbr=on|order=flip}} wide at a range of {{convert|50|m|ft|abbr=on|order=flip}}. The force of the explosion deforms the relatively soft steel balls into a shape similar to a [[.22 rimfire]] projectile.<ref name="Grupp" /> These fragments are moderately effective up to a range of {{convert|100|m|ft|abbr=on|order=flip}}, with a hit probability of around 10% on a prone man-sized {{convert|1.3|sqft|m2|adj=on}} target. The fragments can travel up to {{convert|250|m|ft|abbr=on|order=flip|sigfig=1}}. The optimum effective range is {{convert|50|m|ft|abbr=on|order=flip}}, at which the optimal balance is achieved between lethality and area coverage, with a hit probability of 30% on a man-sized target.<ref>{{cite web|url=http://www.globalsecurity.org/military/systems/munitions/m18-claymore.htm|title=M18 Claymore|first=John|last=Pike|website=www.globalsecurity.org|access-date=4 April 2018|archive-url=https://web.archive.org/web/20180405090136/https://www.globalsecurity.org/military/systems/munitions/m18-claymore.htm|archive-date=5 April 2018|url-status=live}}</ref>

The weapon and all its accessories are carried in an M7 [[bandolier]] ("Claymore bag"). The mine is detonated as enemy personnel enter the killing zone. Controlled detonation may be accomplished by use of either an electrical or non-electrical [[detonator|firing system]]. When mines are employed in the controlled role, they are treated as individual weapons and are reported in the unit [[fire plan]]. They are not reported as mines; however, the emplacing unit must ensure that the mines are removed, detonated, or turned over to a relieving unit. The {{convert|100|ft|m|adj=on}} M4 electric firing wire on a green plastic spool is provided in each bandolier. The M57 firing device (colloquially referred to as the "clacker") is included with each mine. An M40 circuit test set is packed in each case of six mines. When the mines are [[Daisy chain (electrical engineering)|daisy-chained]] together, one firing device can detonate several mines.

The mine can be detonated by any mechanism that activates the blasting cap. There are field-expedient methods of detonating the mine by tripwire, or by a timer, but these are rarely used.

== Development ==
The development of the M18A1 mine dates back to work done during [[World War II]]. The [[Misnay–Schardin effect]] was independently discovered during that war by József Misnay, a [[Hungary|Hungarian]], and [[Hubert Schardin]], a German. 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. Schardin spent some time developing the discovery as a side-attack [[anti-tank]] weapon, but development was incomplete at the end of the war. Schardin also spent time researching a "trench mine" that used a directional fragmentation effect.<ref name="Grupp" />

=== Norman MacLeod and Calord Corporation ===
[[File:Macleod Claymore patent.png|right|thumb|Images from the 1956 Macleod patent]]
Following the massed Chinese attacks during the [[Korean War]], Canada and the United States began to develop projects to counter them. Canada fielded a weapon called the "Phoenix" landmine, which used the Misnay–Schardin effect to project a spray of {{convert|0.25|in|mm|adj=on}} steel cubes towards the enemy. The cubes were embedded in {{convert|5|lb|kg}} of [[Composition B]] explosive. It was too large to be a practical infantry weapon and was relatively ineffective, with a maximum effective range of only {{convert|20|to|30|m|ft|order=flip|sigfig=1}}.<ref name="Grupp" />

Around 1952 Norman MacLeod, at his company the Calord Corporation, began working on a small directional mine for use by infantry. It is not clear if the United States [[Picatinny Arsenal]] took the concept from the Canadian weapon and asked Norman MacLeod to develop it, or if he developed the design independently and presented it to them. 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.

Through Picatinny, the United States Army accepted the weapon into service as the M18 Claymore and approximately 10,000 were produced. It was used in small numbers in Vietnam from around 1961. It was not until the improved M18A1 was developed that the Claymore became a widely used weapon.

The M18 was {{convert|9.25|in|mm}} long and {{convert|3.27|in|mm}} high, held in a plastic case with three folding spike legs on the bottom. An electrical blasting cap for triggering the mine was inserted through a small hole in the side. Internally the mine consisted of a layer of {{convert|12|oz|g}} of [[C-3 (plastic explosive)|C-3 explosive]] (the forerunner of [[C-4 explosive]]) in front of which was laid an array of {{convert|0.25|in|mm|adj=on}} steel cubes. In total the mine weighed about {{convert|2.43|lb|kg}}, and could be fitted with an optional peep sight for aiming.<ref>{{ORDATA mines|1073|M18}}</ref> It lacked the later version's iconic "FRONT TOWARD ENEMY" marking. 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 mine was triggered from a safe position, preferably to the side and rear. 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 {{convert|90|ft|m|sigfig=1}}.<ref name="Grupp" />

MacLeod applied for a patent for the mine on 18 January 1956, and was granted it in February 1961.<ref>{{cite web|url=https://patents.google.com/patent/US2972949|title=Patent 2,972,949 ANTI-PERSONNEL FRAGMENTATION WEAPON}}</ref> The patent was later the subject of a civil court case between MacLeod, the Army, and Aerojet, which further developed the Claymore design. MacLeod's case collapsed when photographs of the German Trenchmine prototype were produced as evidence of [[prior art]].<ref name="Grupp" />

=== Throner, Kennedy, Bledsoe, and Kincheloe at Aerojet ===
[[File:M18 claymore US army drawing.svg|right|thumb|The original M18 Claymore mine. The detonator is inserted into the side.]]
In 1954 [[Picatinny Arsenal]] issued a request for proposals (RFP) to improve the M18 as a more effective weapon. At [[Aerojet]] in the early 1950s, Guy C. Throner had independently come up with a design for a Claymore-like mine. He worked with Don Kennedy and the two men submitted a 30-page proposal in response to Picatinny's RFP. They were awarded a $375,000 development contract to improve the Claymore design. The Picatinny criteria for the weapon were as follows:
* It must weigh less than {{convert|3.5|lb|kg|abbr=off}}
* It must throw enough fragments so that at a range of {{convert|55|yd|m}} it achieves a 100 percent strike rate on a {{convert|1.3|sqft|m2|adj=on}} target (man-sized)
* The fragment area must not be more than {{convert|8|ft|m}} high and no more than 60° wide
* Fragments must have a velocity of {{convert|4000|ft/s|m/s}} providing 58&nbsp;[[foot-pounds]] (79&nbsp;[[joules]]) of [[kinetic energy]] delivered to the target.

The requirement for kinetic energy was based on the fact that 58-foot-pounds is required to deliver a potentially lethal injury.<ref>{{cite web|url=https://sill-www.army.mil/famag/2003/MAR_APR_2003/MAR_APR_2003_PAGES_10_12.pdf |title=Engineering the Nonlethal Artillery Projectile |author=Stephen G. Floroff |url-status=live |archive-url=https://web.archive.org/web/20070127055215/http://sill-www.army.mil/famag/2003/MAR_APR_2003/MAR_APR_2003_PAGES_10_12.pdf |archive-date=January 27, 2007}}</ref> Given the requirements of weight and fragment density, approximately 700 fragments were needed, with the ability to aim the mine with an accuracy of around {{convert|2|ft|m|sigfig=1}} at the center of the target zone. The team at Aerojet were given access to all previous research into directional mines, including the M18 and the Phoenix, as well as German research. Dr. John Bledsoe led the initial project.<ref name="Grupp">{{cite book|title=Claymore mines, Their History and Development|author=Larry Grupp|date=May 1993|publisher=Paladin Press|isbn=0-87364-715-7}}</ref>

The original M18 mine fell far short of Picatinny's requirements. One of the first improvements was to replace the steel cubes with {{convert|7/32|in|mm|adj=on}} hardened 52100 alloy ball bearings. These performed poorly for two reasons. Firstly, the hardened steel balls [[spall]]ed into fragments when hit by the shock of the explosion; the fragments were neither aerodynamic enough nor large enough to perform effectively. Secondly, the blast "leaked" between the balls, reducing their velocity.<ref name="Grupp" />

A second problem was the curvature of the mine. This was determined experimentally by Bledsoe, through a large number of test firings. After Bledsoe left the project to work at the Rheem corporation, William Kincheloe, another engineer, came onto the Claymore project.<ref name="Grupp" />

Kincheloe immediately suggested using softer {{convert|1/8|in|mm|adj=on}} steel "gingle" balls, which were used in the foundry process. They did not spall from the shock of the explosive, but deformed into a useful aerodynamic shape similar to a [[.22 Long Rifle|.22 rimfire]] projectile. Using a homemade [[Gun chronograph|chronograph]], the engineers clocked the balls at {{convert|3775|ft/s|m/s}}. The second change was to use a poured plastic matrix to briefly contain the blast from the explosive, so that more of the blast energy was converted into projectile velocity. After a number of experiments, the engineers settled on Devcon-S steel-filled [[epoxy]] to hold the balls in place. With this change, the velocity improved to {{convert|3995|ft/s|m/s}}.<ref name="Grupp" />

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. Using dyes to test various plastics for leaks, they found a suitable plastic called Durex 1661½, which could be easily molded into a case.<ref name="Grupp" />

[[File:Claymore Recon placement.jpg|thumb|300px|left|A [[United States Marine Corps|US Marine]] places a Claymore mine.]]

By the spring of 1956, Aerojet had a near-final design. It was awarded a pre-production contract for 1,000 M18A1 Claymores, designated T-48E1 during testing. The initial versions of the mine used two pairs of wire legs produced from number 9 (3&nbsp;mm) wire. Later when production was ramped up, the design was changed to flat steel scissor, folding-type legs.<ref name="Grupp" />

Early pre-production mines were triggered using a battery pack, which had been used with the M18. This was found to be undesirable for a number of reasons. Bill Kincheloe came up with the idea of using a "Tiny Tim" toggle generator, of the type used with a number of Navy rockets.<ref name="Grupp" /> Originally an aluminum box was used to hold the generator. 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.<ref name="Grupp" />

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. 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. They adopted simple peep sights, which were later replaced by a knife blade sight.

Testing concluded that the mine was effective out to approximately {{convert|110|yd}}, being capable of hitting 10% of the attacking force. At {{convert|55|yd}}, this increased to 30%. The development project completed, the Aerojet team sent the project back to Picatinny. The Arsenal bid it out to various component suppliers. In 1960 it was type standardized as the M18A1. It was first used in [[Vietnam]] in the spring or early summer 1966.<ref name="Grupp" />

Minor modifications were made to the mine during its service. A layer of tinfoil was added between the fragmentation matrix and the explosive. This slightly improves the fragment velocity, and protects the steel fragments from the corrosive explosive. A [[Ferrite bead|ferrite choke]] was added to prevent RF signals and lightning from triggering the mine.<ref name="Grupp" />

==Variants==

===M68 inert training kit===
The M68 kit is designed to familiarize personnel with the placement and arming of a real M18 directional mine. It comes with all the components of a real Claymore kit packed in an M7 bandolier. The light blue or black plastic M33 inert anti-personnel mine is the training and practice version of the M18A1 Claymore. Some inert mines were green with a light blue band. It does not contain an explosive or pyrotechnic filler of any kind. It is packed in a Claymore bag with inert M10 simulated detonator cap wire, an M57 "clacker" firing control, and an M40 circuit test kit.

=== Mini-Multi-Purpose Infantry Munition ===
In early 2015, the U.S. Army began testing a smaller version of the Claymore called the Mini-Multi-Purpose Infantry Munition (M-MPIMS). It weighs {{convert|2|lb|kg|sigfig=1}} and has a {{convert|50|m|ft|abbr=on|order=flip}} effective range, similar to the full-size Claymore. At its optimized range of {{convert|30|m|ft|abbr=on|order=flip|sigfig=1}}, the fragmentation zone is {{convert|23|m|ft|abbr=on|order=flip}} wide and {{convert|2|m|ft|abbr=on|order=flip|0}} high, with a minimum of five hits per square meter (0.5 per square foot). It has the surface space of an average [[smartphone]] and includes a [[Picatinny rail]] for camera, laser, or other attachments. The M-MPIMS is designed to be more controllable than the Claymore with less collateral damage, using an [[insensitive munition]]s explosive that is poured rather than packed for more uniform distribution results in more consistent blast pattern. Rear-safety distance has been decreased to {{convert|15|m|ft|abbr=on|order=flip|sigfig=1}} and shelf life has been increased to 25&nbsp;years.<ref>[http://www.militarytimes.com/story/military/tech/2015/04/06/benning-aewe-battelab-tech/70214876/ RPGs, grenades and dummies: 9 soldier-tested gadgets] {{Webarchive|url=https://web.archive.org/web/20150408204652/http://www.militarytimes.com/story/military/tech/2015/04/06/benning-aewe-battelab-tech/70214876/ |date=2015-04-08 }} – Militarytimes.com, 6 April 2015</ref>

==International directional fragmentation AP mines==
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. Its lethality out to {{convert|50|m|ft|order=flip}} arrives in the form of 650&nbsp;steel balls and it is activated by remote control or trip wire.

The M18 directional fragmentation anti-personnel mine, developed by Cardoen of Chile, contains 626 grams of explosives, surrounded by 607&nbsp;anti-personnel fragmentation units providing a 60° [[arc of fire]], with a {{convert|50|to|250|m|ft|order=flip|adj=on}} lethal range.

Italy produces the DAF M6 and DAF M7 directional fragmentation mines, weighing {{convert|18|and|10|kg|lb|order=flip}} respectively, with trip wire or remote control detonation. Their appearance is similar to the Claymore mine.<ref>{{Cite web |url=https://www.cyberevoblog.blogspot.com/ |title=Army{{!}}Air Force{{!}}Navy{{!}}Chinese Defense Blog |access-date=2019-07-22 |archive-url=https://web.archive.org/web/20161022214459/https://cyberevoblog.blogspot.com/ |archive-date=2016-10-22 |url-status=dead }}</ref>{{better source needed|date=February 2021|reason=this is a blog & URL does not mention claymore mines}}

== National copies ==
A number of licensed and unlicensed copies of the mine have been produced.
* {{Flag|Canada}}: C19 Defensive and Support Mine
* {{Flag|Chile}}: M18
* {{Flag|China}}: Type 66
* {{Flag|Finland}}: {{ill|Viuhkapanos|fi}} (Directional Charge) VP 88, "heavier" VP 84 and VP 2010
* {{Flag|Hungary}}: IHR-60
* {{Flag|Italy}}: VS-DAFM 7<ref>{{cite web |title=VS-DAFM 7 Italian anti-personnel "Claymore" mine |url=http://ordatamines.maic.jmu.edu/displaydata.aspx?OrDataId=5452 |url-status=dead |work=Technical specs at James Madison University – Mine Action Information Center |archive-url=https://web.archive.org/web/20071017193103/http://ordatamines.maic.jmu.edu/displaydata.aspx?OrDataId=5452 |archive-date= 2007-10-17}}</ref>
* {{Flag|Pakistan}}: P5 Mk1
* {{Flag|Philippines}}: M18A2<ref>{{cite web|archive-url=https://web.archive.org/web/20110719024112/http://www.floro-intl.com/clay.html|archive-date=2011-07-19|url=http://www.floro-intl.com/clay.html
|title=Anti-Personnel Mines |publisher=Floro International Corporation |access-date=2011-01-10}}</ref>
* {{Flag|Poland}}: M18 Claymore
* {{Flag|Russia}}: [[MON-50]]
* {{Flag|Saudi Arabia}}: M18A/M18A1 <ref>{{cite web|url=http://www.dsca.mil/major-arms-sales/kingdom-saudi-arabia-ksa-ammunition-royal-saudi-land-forces-rslf|title=Kingdom of Saudi Arabia (KSA) – Ammunition for the Royal Saudi Land Forces (RSLF) – The Official Home of the Defense Security Cooperation Agency|website=www.dsca.mil|access-date=4 April 2018|archive-date=18 January 2018|archive-url=https://web.archive.org/web/20180118053613/http://dsca.mil/major-arms-sales/kingdom-saudi-arabia-ksa-ammunition-royal-saudi-land-forces-rslf|url-status=dead}}</ref>
* {{Flag|Serbia}}: [[MRUD]] (Mina Rasprskavajućeg Usmerenog Dejstva)
* {{Flag|South Africa}}:
**Shrapnel mine No 2
**[[Mini MS 803 mine]]
* {{Flag|South Korea}}:
**K440, slightly smaller than the Claymore with 770 fragments.
**KM18A1
* {{Flag|Sweden}}:
**FFV-013<ref>{{cite web | title= FFV-013 Swedish anti-personnel "Claymore" mine | work= Technical specs at James Madison University – Mine Action Information Center | url= http://ordatamines.maic.jmu.edu/displaydata.aspx?OrDataId=7544 | url-status= dead | archive-url= https://web.archive.org/web/20071017193108/http://ordatamines.maic.jmu.edu/displaydata.aspx?OrDataId=7544 | archive-date= 2007-10-17 }}</ref>
**Försvarsladdning 21
**LI-12/Truppmina 12<ref>{{cite web |title= LI-12/Truppmina-12 Swedish anti-personnel "Claymore" mine |work= Technical specs at James Madison University – Mine Action Information Center |url= http://ordatamines.maic.jmu.edu/displaydata.aspx?OrDataId=7545 |url-status= dead |archive-url= https://web.archive.org/web/20071017193113/http://ordatamines.maic.jmu.edu/displaydata.aspx?OrDataId=7545 |archive-date= 2007-10-17 }}</ref>
* {{Flag|Turkey}}: M18 AP Mine
* {{Flag|United States}}: [[Arms Tech Limited|Arms Tech]] [[MM-1 Minimore|MM-1 "Minimore"]], a smaller variant conceived for [[Special Forces]] use
* {{Flag|Vietnam}}: MDH-C40. North Vietnamese copy during [[Vietnam War]]<ref>{{Cite web |url=https://nongnghiepmoitruong.vn/vu-khi-doc-dao-cua-nguoi-viet-min-dinh-huong-d135251.html |access-date=2025-06-01 |website=nongnghiepmoitruong.vn |title=Vũ khí độc đáo của người Việt: Mìn định hướng |date=30 November 2014 }}</ref> 

===Non-State Actors===
* [[Viet Cong]]: Used homemade copies of Claymore mines.{{sfnp|Rottman|2020|p=27}}
* [[Provisional IRA]]: used home-made variants in [[the Troubles]]. [[Dissident Irish republican campaign|Dissident Irish Republicans]] have continued to develop them.<ref>{{Cite news |date=2016-05-17 |title=Capanagh Forest arms find: Police baffled by apparent dissident republican weapons dump |url=https://www.bbc.com/news/uk-northern-ireland-36314630 |access-date=2025-12-22 |work=BBC News |language=en-GB}}</ref>

== See also ==
* [[Fougasse (weapon)]]
* [[List of individual weapons of the U.S. Armed Forces]]
* [[Punt gun]] – similar killing effects at a wide area

== References ==
{{Reflist}}

==Bibliography==
* {{cite book |last1=Rottman |first1=Gordon L. |date= 2020 |title=Vietnam War Booby Traps |location=Oxford |publisher=Osprey Publishing|isbn= 978-1472842459}}

== External links ==
{{Commons|M18 Claymore|M18A1 Claymore Antipersonnel Mine}}
* [http://www.the-monitor.org/media/1419411/claymore_jan_2003.pdf International Coalition to Ban Landmines – Countries using Claymore type mines (PDF)]
* [https://www.globalsecurity.org/military/library/policy/army/fm/23-23/ FM 23-23 ''ANTIPERSONNEL MINE M18A1 AND M18 (CLAYMORE)'' Field Manual]—[[GlobalSecurity.org]]

{{USAF Weapons}}

[[Category:Anti-personnel mines]]
[[Category:Land mines of the United States]]
[[Category:Military equipment introduced in the 1960s]]