PMA-2 Anti-Personnel Mine

Ordnance Overview

The PMA-2 is a Yugoslavian-designed stake-mounted bounding fragmentation anti-personnel mine that represents one of the most lethal area-denial weapons ever deployed. Distinguished by its unique bounding mechanism that propels the mine body approximately 1 meter into the air before detonation, the PMA-2 scatters deadly fragmentation across a wide area, making it capable of inflicting casualties on multiple personnel simultaneously. Its simple yet effective design and devastating effects have made it a persistent threat in former Yugoslav conflict zones and other regions where it was deployed.

Country/Bloc of Origin

Country: Yugoslavia (Socialist Federal Republic of Yugoslavia)
Development Period: 1970s
Bloc: Non-Aligned Movement (Yugoslavia maintained independence from both NATO and Warsaw Pact)
International Variants: Limited variants; primarily remained Yugoslav design
Distribution: Widely distributed to various nations and non-state actors globally
Successor States: After Yugoslavia’s dissolution, stockpiles divided among successor states (Serbia, Croatia, Bosnia-Herzegovina, etc.)

Ordnance Class

Type: Anti-Personnel (AP) Mine
Primary Role: Bounding fragmentation mine designed to kill or injure multiple personnel
Subclass: Stake-mounted directional/omnidirectional fragmentation mine
Delivery Method: Hand-emplaced, stake-mounted above ground
Target: Infantry units and personnel in the open
Effect: Area denial through fragmentation and blast

Ordnance Family/Nomenclature

Official Designation

Primary Designation: PMA-2
Full Designation: Protivpešadijska Mina Aktivna-2 (Anti-Personnel Mine Active-2)
Series: Part of the PMA series of Yugoslav mines

Related Variants

PMA-1: Smaller predecessor with similar design philosophy
PMA-3: Later development with modifications
PMR-2: Related stake-mounted mine
PROM-1: Related bounding fragmentation mine (larger and more powerful)

Alternative Designations

Sometimes referenced as “Yugoslavian Bouncing Betty”
Intelligence reports may reference it as “PMA-Series Stake Mine”
Local populations may use various colloquial names

Family Characteristics

All PMA-series mines share:

Stake-mounted configuration
Fragmentation effect
Trip-wire activation capability
Yugoslav design heritage

Hazards

Primary Hazard Types

Fragmentation Hazard: PRIMARY

425 pre-formed steel balls create devastating fragmentation pattern
Fragments effective up to 25-30 meters
360-degree omnidirectional fragmentation after bounding
Fragment velocity sufficient to penetrate body armor at close range

Blast Hazard: SECONDARY

100 grams of explosive creates significant blast overpressure
Bounding charge propels mine body upward with additional blast effect
Combined blast from bounding and main charge

Psychological Hazard

Visible above-ground placement creates psychological deterrent
Bounding action increases fear factor among troops
Area denial effect exceeds physical danger zone

Sensitivity Profile

Trip-Wire Activation: Primary activation method; 2-5 kg pull force
Tilt Sensitivity: Moderate if mine or stake disturbed
Vibration: Low sensitivity to ground vibration
Magnetic: Minimal metal detection signature (stake provides most metal)
Command Detonation: Can be fitted with command wire for deliberate detonation

Environmental Considerations

Weather Resistance: Moderate; exposed position vulnerable to weathering
Vegetation Growth: Can become concealed by grass and vegetation over time
Stake Corrosion: Metal stake degrades over years, potentially destabilizing mine
Wire Degradation: Trip-wires can corrode, break, or become more sensitive
Visibility: Stake-mounted design makes it potentially visible but easily camouflaged

Danger Areas

Kill Radius: 10-15 meters (high probability of fatal injury)
Casualty Radius: 25-30 meters (fragmentation injuries)
Effective Height: Detonates at ~1 meter height (waist/chest level)
Multiple Casualties: Capable of injuring 10+ personnel in area
Safe Distance: Minimum 100 meters for personnel

UXO Considerations

Long-Term Stability: Moderate; exposed position leads to faster degradation
Trip-Wire Hazards: Degraded wires can become more sensitive or less visible
Stake Failure: Rusted stakes can collapse, potentially causing detonation
Handling Danger: Extremely dangerous to move or neutralize
Secondary Effects: May be part of minefield with additional mines

Key Identification Features

Physical Dimensions

Mine Body:

Height: Approximately 125mm (4.9 inches)
Diameter: Approximately 80mm (3.1 inches) at widest point
Weight (Complete): Approximately 3.3 kg (7.3 lbs) including stake
Explosive Content: 100 grams TNT/Composition B
Fragmentation: 425 steel balls (approximately 5-6mm diameter each)

Stake:

Length: Approximately 1 meter (39 inches)
Material: Metal (steel or iron)
Design: Pointed end for ground insertion, mounting bracket at top

Visual Characteristics

Shape and Profile

Mine Body:

Overall Shape: Cylindrical with conical top
Top Section: Cone-shaped fuzing assembly
Middle Section: Cylindrical body containing fragmentation balls
Base: Flat or slightly concave mounting surface
Stake Mount: Bracket or clip system attaches to stake

Above-Ground Profile:

Mine mounted on stake 10-30cm above ground
Stake driven into ground for stability
Trip-wires extend outward in multiple directions

Color Schemes

Mine Body: Typically olive green, dark green, or brown paint
Stake: Usually olive drab or unpainted metal (rust color common)
Trip-Wires: Black, brown, or dark green; may be natural fiber or synthetic
Weathering: Paint deteriorates to expose underlying metal or primer
Camouflage: Often painted to match local vegetation

Material Composition

Mine Body: Sheet metal or thin steel construction
Fragmentation Medium: 425 pre-formed steel balls embedded in matrix
Explosive: TNT or Composition B
Fuze Components: Metal striker, spring, and percussion cap
Stake: Steel or iron rod
Trip-Wire: Steel wire, brass wire, or sometimes natural fiber

Distinctive Features

Mine Identification:

Conical top with visible fuze assembly
Cylindrical body with visible seams or welds
Mounting bracket on base for stake attachment
May have manufacturer markings or serial numbers
Fragmentation balls sometimes visible through damage or weathering

Deployment Characteristics:

Stake-mounted above ground (distinctive field signature)
Multiple trip-wires radiating outward (3-5 typically)
Trip-wire height: 10-30cm above ground
Stake partially buried with mine exposed

Manufacturer Markings

Cyrillic or Latin script indicating Yugoslav manufacture
Production year or batch numbers
Factory codes (various Yugoslav munitions plants)
May have quality control stamps
Markings often deteriorated or painted over

Fuzing Mechanisms

Fuze Type

Primary Fuze: MUV-3 or MUV-4 mechanical pull fuze
Mechanism: Tension-release striker fuze
Redundancy: Typically single fuze, but multiple trip-wires provide redundancy
Fuze Location: Top of mine body in conical assembly

Arming Sequence

Installation Process:

Stake Emplacement: Metal stake driven into ground at desired location
Mine Mounting: Mine body attached to stake via mounting bracket
Height Adjustment: Mine positioned 10-30cm above ground level
Safety Pin Status: Safety pin keeps striker under tension
Trip-Wire Attachment: Multiple wires attached to fuze assembly
Wire Positioning: Wires extended outward and secured to anchors
Safety Removal: Safety pin removed, mine armed
Final State: Mine armed and ready; trip-wire pull will activate

Triggering Mechanism

Two-Stage Detonation:

Stage 1: Initiation

Personnel contacts trip-wire
Pull force (2-5 kg) releases striker
Striker impacts percussion cap
Cap ignites bounding charge

Stage 2: Bounding and Main Detonation

Bounding charge (small explosive) detonates
Gas pressure propels mine body upward
Mine rises approximately 1 meter
Delay element (0.5-1 second) allows bounding
Main charge detonates at ~1 meter height
100g explosive detonates fragmentation balls
425 steel balls scatter in 360-degree pattern

Delay Mechanism

Bounding Delay: Mechanical or pyrotechnic delay (~0.5-1 second)
Purpose: Ensures mine reaches optimal height before main detonation
Reliability: Generally reliable but can vary slightly
Failure Mode: Rare failures may cause ground detonation (less effective)

Safety Features

Safety Pin: Removable pin prevents accidental activation during transport/emplacement
No Self-Destruct: PMA-2 has NO self-destruct mechanism
No Self-Neutralization: Remains indefinitely active once armed
No Electronic Components: Purely mechanical system

Anti-Handling Devices

Standard Configuration: No integrated anti-handling device
Modification Potential: Can be fitted with anti-lift or anti-disturbance devices
Common Modifications: Additional pull-fuze at base or tilt-rod added
Tamper Resistance: Any disturbance of mine or stake risks detonation

History of Development and Use

Development Timeline

Early 1970s: Design and Development

Developed by Yugoslav military industry to provide effective area denial capability
Design influenced by Soviet POMZ stake mines and German S-mine concepts
Incorporated lessons from earlier PMA-1 mine
Emphasis on simplicity, reliability, and effectiveness

Mid-1970s: Production and Testing

Entered production at Yugoslav munitions factories
Tested in various climatic and terrain conditions
Proven effective in mountainous Balkan terrain
Integrated into Yugoslav People’s Army doctrine

Late 1970s-1980s: Deployment and Export

Widely deployed by Yugoslav forces for defensive positions
Exported to numerous countries globally
Provided to various non-aligned nations
Stockpiled in significant quantities throughout Yugoslavia

Combat Employment

Yugoslav Wars (1991-2001)

The PMA-2 saw extensive use during the breakup of Yugoslavia:

Croatian War of Independence (1991-1995):

Deployed extensively by all sides
Used for defensive perimeters and area denial
Created persistent contamination in rural areas
High civilian casualty rates post-conflict

Bosnian War (1992-1995):

Massive deployment across frontlines
Used in ethnic cleansing operations to deny area access
Created one of world’s worst mine contamination problems
Thousands of PMA-2 mines remained post-war

Kosovo Conflict (1998-1999):

Deployed by Serbian forces and KLA
Used for border security and territory denial
Significant contamination in rural areas
Ongoing clearance efforts decades later

Global Distribution

Export and Proliferation:

Exported to Middle Eastern nations
Supplied to various African conflicts
Provided to Southeast Asian militaries
Transferred to non-state actors globally

Notable Deployments:

Iraq (Iran-Iraq War)
Angola (Civil War)
Various other conflicts through 1980s-1990s

Humanitarian Impact

The PMA-2 has had devastating humanitarian consequences:

Casualty Statistics:

Thousands of casualties in former Yugoslavia alone
High proportion of civilian casualties
Injuries typically severe due to fragmentation pattern
Many victims are farmers, shepherds, and children

Clearance Challenges:

Difficult to detect due to minimal metal content
Dangerous to neutralize due to fuzing sensitivity
Above-ground placement exposed to weathering (unstable)
Trip-wires become harder to see over time
Requires manual clearance (mechanized clearance risky)

Current Status

Production Status: Officially discontinued in successor states
Stockpile Status: Significant stockpiles remain in Balkans
Operational Status: Still actively deployed in some regions
Clearance Status: Ongoing demining in former Yugoslav territories
Ottawa Treaty: Most Yugoslav successor states signed Mine Ban Treaty
Legacy Contamination: Will remain a threat for decades

Impact on Mine Warfare

The PMA-2 influenced mine warfare doctrine by:

Demonstrating effectiveness of simple bounding fragmentation designs
Showing psychological impact of visible mines
Highlighting humanitarian consequences of long-term contamination
Contributing to international mine ban movement

Technical Specifications

Explosive Characteristics

Main Charge Type: TNT or Composition B
Main Charge Weight: 100 grams
Bounding Charge: Small black powder or similar charge
Bounding Charge Weight: Approximately 10-15 grams
Detonation Velocity: ~6,900 m/s (TNT) or ~8,000 m/s (Comp B)
Total Explosive Weight: ~110-115 grams

Fragmentation Specifications

Fragment Type: Pre-formed steel balls
Number of Fragments: 425 balls
Fragment Size: Approximately 5-6mm diameter
Fragment Material: Hardened steel
Fragment Velocity: 1,000-1,500 m/s at detonation
Fragment Pattern: 360-degree omnidirectional
Effective Fragment Range: 25-30 meters
Lethal Fragment Energy: Sufficient to penetrate soft body armor

Operating Parameters

Activation Force: 2-5 kg pull on trip-wire
Bounding Height: Approximately 0.8-1.2 meters
Delay Time: 0.5-1.0 seconds (bounding to detonation)
Operating Temperature: -40°C to +65°C
Shelf Life: Decades when properly stored
Functional Life (Deployed): Years to decades (degrades over time)

Deployment Specifications

Emplacement:

Emplacement Time: 5-10 minutes per mine (trained operator)
Stake Depth: 30-50cm ground penetration
Mine Height: 10-30cm above ground (typical)
Trip-Wire Length: 5-15 meters per wire (typical)
Number of Wires: 3-5 wires per mine (standard)
Wire Height: 10-30cm above ground
Spacing in Minefield: 5-10 meters between mines

Pattern Deployment:

Often deployed in checkerboard patterns
Integrated with other mine types for layered defense
Trip-wires can overlap for redundancy
May be combined with command-detonated systems

Performance Characteristics

Detection Difficulty: Moderate (stake provides metal signature, but mine body minimal)
Clearance Resistance: Very high (manual clearance required)
All-Weather Capability: Moderate (degradation in harsh conditions)
Casualty Effectiveness: Very high (multiple casualties per detonation)
Psychological Effect: Extreme (visible placement and bounding action)

Frequently Asked Questions

Q: How does the PMA-2’s bounding mechanism work, and why is it so deadly?

A: The PMA-2’s lethality comes from its two-stage detonation process. When someone triggers the trip-wire with 2-5 kg of pull force, the striker is released and ignites a small bounding charge at the base of the mine. This bounding charge generates gas pressure that literally launches the mine body upward—like a projectile fired from a mortar. The mine rises to approximately 1 meter height (roughly waist-to-chest level on an adult), held briefly by a mechanical or pyrotechnic delay element. At this optimal height, the main charge of 100 grams of TNT detonates, scattering 425 pre-formed steel balls in a 360-degree pattern. This height is critical: detonating at ground level would waste most fragments in the soil, but at 1 meter, the fragments travel unobstructed across a wide area, striking multiple personnel in vital body areas (torso, head, groin) rather than just lower extremities. The combination of optimal height, omnidirectional fragmentation, and high fragment velocity makes the PMA-2 capable of inflicting casualties on 10 or more personnel with a single detonation.

Q: Why is the PMA-2 particularly difficult and dangerous for demining teams?

A: The PMA-2 presents multiple challenges that make it one of the most dangerous mines to clear. First, the trip-wire activation system means there are multiple points of potential initiation—disturbing any of the 3-5 trip-wires can trigger the mine, and these wires may be nearly invisible, especially when covered by vegetation or soil. Second, the mine’s above-ground position means it’s exposed to weathering: rusted stakes can weaken, trip-wires can corrode and become more sensitive or break unexpectedly, and the fuze mechanism can deteriorate into an unstable state. Third, any attempt to move or neutralize the mine risks triggering the fuze, and if it detonates during clearance, the deminer is almost certainly within the kill radius. Fourth, the stake-mounted position makes it difficult to destroy in place without manual approach—you can’t simply detonate it remotely without first dealing with the trip-wires. Finally, PMA-2 mines are often deployed in complex patterns with overlapping trip-wires and mixed with other mine types, requiring deminers to clear entire areas with extreme caution. The standard clearance procedure involves carefully identifying all trip-wires, tracing them back to the mine, then neutralizing the fuze—a process that can take an hour or more per mine and carries significant risk throughout.

Q: How does the PMA-2 compare to the famous German S-mine “Bouncing Betty” from World War II?

A: The PMA-2 and the German S-mine (Schrapnellmine) share the same basic operating principle—both are bounding fragmentation mines that jump before detonating—but there are significant differences. The S-mine was larger (4.7 kg vs. 3.3 kg), contained more explosive (365g vs. 100g), and had approximately 360 steel balls compared to the PMA-2’s 425 smaller balls. The S-mine was buried flush with the ground and activated by pressure or trip-wire, while the PMA-2 is stake-mounted above ground. The S-mine bounded to approximately 1.5 meters, slightly higher than the PMA-2’s 1 meter. Despite these differences, both mines share the same tactical purpose and horrifying effectiveness: detonating at waist-to-chest height to maximize casualties against standing personnel. The PMA-2’s design clearly drew inspiration from the S-mine concept, but simplified it for easier manufacture and deployment. Some experts consider the PMA-2 actually more dangerous in the long term because its above-ground position makes it more susceptible to weathering-induced instability, while the S-mine’s buried position provided some protection from environmental degradation.

Q: What tactical advantages does the stake-mounted design provide, and what are its disadvantages?

A: The stake-mounted design of the PMA-2 offers several tactical advantages that made it attractive for military use. First, it’s incredibly fast to deploy—simply drive in a stake, attach the mine, extend trip-wires, and arm. This rapid emplacement allows for quick creation of defensive barriers. Second, the above-ground position makes it immune to ground shock from artillery or vehicle traffic that might affect buried mines. Third, it works well in areas where burial is difficult (rocky terrain, frozen ground, urban rubble). Fourth, multiple trip-wires can be extended in different directions, making the mine more likely to be triggered. Fifth, the visible nature (when not camouflaged) creates a psychological deterrent—troops who spot the mines become extremely cautious. However, the design has disadvantages: the above-ground position makes it potentially visible and therefore easier to avoid if detected; exposure to weather causes faster degradation of the fuze mechanism and trip-wires; livestock and wildlife can potentially trigger it (wasting the mine); and the stake provides a metal signature that aids detection. Despite these disadvantages, Yugoslav forces clearly felt the rapid deployment and flexibility outweighed the drawbacks, especially for temporary defensive positions.

Q: Can modern military forces effectively counter PMA-2 minefields?

A: Modern military forces have developed multiple approaches to counter PMA-2 and similar stake-mounted mines, though none is perfect. Visual reconnaissance from safe distances or using drones can potentially spot the stakes, especially in areas with low vegetation. Thermal imaging can sometimes detect the metal stakes based on temperature differential. Explosive line charges (like the British Python or US MICLIC) can detonate mines in a cleared lane, though this is less effective against above-ground mines than buried ones. Remote-controlled mine-clearing vehicles with flails or rollers can sometimes destroy these mines, though trip-wires can extend beyond the vehicle’s width. Infantry can employ “proofing” techniques, using long poles or grappling hooks to trigger trip-wires from safe distances. However, all these methods are slow, dangerous, and not 100% reliable. The most effective military approach is often to simply avoid suspect areas and use alternative routes—exactly the area denial effect the mine was designed to achieve. In high-intensity operations, forces might accept casualties and breach through minefields using overwhelming firepower and speed, but this is extremely costly. The unfortunate reality is that the PMA-2’s simple but effective design continues to pose a significant tactical challenge even to modern militaries.

Q: Why do the steel balls in the PMA-2 cause such severe injuries?

A: The 425 steel balls in the PMA-2 create devastating injuries through a combination of factors rooted in physics and ballistics. When the 100-gram main charge detonates, each steel ball is accelerated to approximately 1,000-1,500 meters per second—about three times the speed of a typical rifle bullet. At these velocities, each 5-6mm ball carries significant kinetic energy despite its small size. The balls are made of hardened steel specifically to maintain their shape and not deform on impact, allowing them to penetrate deeply into tissue. When a ball enters the body at supersonic speed, it creates a permanent cavity (the hole it makes) and a much larger temporary cavity (from the shock wave through tissue), causing massive trauma. A single ball can penetrate soft body armor, shatter bones, and damage multiple organs. The lethality is compounded by the fact that a person in the casualty radius might be hit by dozens of these balls simultaneously, each creating its own wound channel. The detonation height of 1 meter means the fragments are traveling in a roughly horizontal plane that intersects with vital organs (heart, lungs, liver, major blood vessels) rather than just lower extremities. Survivors typically suffer multiple penetrating wounds, shattered bones, massive tissue damage, and severe bleeding—injuries that require immediate trauma surgery and often result in permanent disability even with the best medical care.

Q: What happened to PMA-2 stockpiles after Yugoslavia broke apart?

A: The dissolution of Yugoslavia in the 1990s created a chaotic situation regarding weapons stockpiles, including PMA-2 mines. The Yugoslav People’s Army had maintained substantial mine stockpiles at various depots and arsenals throughout the country. As Yugoslavia fractured into multiple nations, these stockpiles were divided, seized, or in some cases looted by the emerging armies of Serbia, Croatia, Bosnia-Herzegovina, Slovenia, Macedonia, and later Montenegro and Kosovo. During the Yugoslav Wars (1991-2001), all parties deployed massive quantities of PMA-2 mines, creating extensive contamination across the region. Some stockpiles were destroyed during fighting, while others were inherited by successor states. After the wars, several successor states signed the Ottawa Mine Ban Treaty (1997), committing to destroy their stockpiles. Croatia, Bosnia-Herzegovina, and others have destroyed tens of thousands of PMA-2 mines in compliance with the treaty. However, significant stockpiles likely remain in some states, and the exact accounting is difficult due to the chaos of the wars and subsequent transitions. Additionally, large numbers of PMA-2 mines were exported from Yugoslavia during the Cold War to various nations worldwide, and these mines remain in service or stockpiled in multiple countries. The legacy of PMA-2 deployment during the Yugoslav Wars remains a major humanitarian problem—decades after the conflicts ended, mines continue to be discovered and to cause casualties in the Balkans.

Q: How can civilians in mine-contaminated areas recognize and avoid PMA-2 mines?

A: Civilian mine awareness is critical in areas contaminated with PMA-2 mines. The most distinctive feature is the metal stake protruding from the ground—typically 10-30cm high—with the mine body attached. However, vegetation growth can obscure these stakes, and they may be deliberately camouflaged. Trip-wires are the greatest danger: thin wires (sometimes barely visible) extending outward from the stake at 10-30cm height. These wires may be metal (and thus might reflect sunlight) or dark-colored synthetic or natural fiber. Warning signs include: areas marked with warning signs or tape (local authorities or demining organizations); unnatural patterns of stakes or posts in fields; paths that detour around specific areas for no apparent reason; dead animals in fields (indicating mine detonations); damaged vegetation in linear patterns (from trip-wires); and areas that locals avoid despite seeming suitable for farming or grazing. The critical safety rules are: never enter areas marked as mined; stay on hard-surfaced roads and well-traveled paths; never pick up or touch any suspicious objects; never investigate unusual items in fields or wooded areas; and if you spot what might be a mine, mark the location from a safe distance, warn others, and report it to authorities. Children should be specifically educated because they’re particularly at risk—the visible stakes and wires can seem like toys or interesting objects to investigate. In mine-contaminated areas, this education has saved countless lives, though mines continue to claim victims decades after conflicts end.

Safety Warning

All ordnance, including the PMA-2 mine, should be considered extremely dangerous until proven safe by qualified Explosive Ordnance Disposal (EOD) personnel. Bounding fragmentation mines like the PMA-2 are particularly lethal due to their wide casualty radius and multiple initiation points. Never approach, touch, or attempt to move any suspected landmine or unexploded ordnance. If you encounter suspected ordnance, immediately:

Mark the location from a safe distance (minimum 100 meters)
Warn others in the area
Report the finding to local authorities, military, police, or mine action organizations
Evacuate the area and prevent others from entering
Do not attempt to “disarm” or move the mine under any circumstances

Special Warning for PMA-2:

Trip-wires may extend 15+ meters from the mine
Wires may be nearly invisible, especially when weathered
Any disturbance of wire, stake, or mine can cause detonation
Fragmentation is lethal up to 15 meters and can cause injury at 30+ meters
Never assume a mine is “safe” even if it appears damaged or old

This document was prepared for educational purposes in mine awareness, EOD training, humanitarian demining operations, and explosive ordnance recognition. It is intended for identification training and technical understanding only. Landmine clearance should only be conducted by trained and certified demining professionals with appropriate equipment and procedures.