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The Unitary Technocracy of Etoile Arcture.
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M124A1 Full Width Attack Mine
 | |
Type | Anti-armour mine |
Place of origin | |
In service | 2021 - present |
Used by | See Users |
Designer | Sequoia Dynamics |
Designed | 2014-2020 |
Manufacturer | Sequoia Dynamics |
Unit cost | US$90 |
Number built | many millions |
Variants | See below |
Weight | 7.26 kg (16 lb) |
Length | 1.4 m (55⅒ in) |
Width | 11 cm (4⅓ in) |
Height | 8.13 cm (3⅕ in) |
Filling | self-forging fragment |
Filling weight | 2.72 kg (6 lb) Composition H6 |
Activation | microprocessor triggered |
Detonation | slapper detonator |
The M124A1 "Fieldspar" Full Width Attack Mine (FWAM) (export designation: Panzerabwehrmine Feldspat, or Mine anti-char modčle 124 F1 Feldspath) is a plastic-cased, minimum metal, Misznay–Schardin effect self-forging fragment (SFF) anti-armour mine designed to immobilise vehicles protected by blast deflecting V-shaped belly plates. It is a so-called 'bar mine' of elongated rectangular shape that offers a long horizontal area of contact for increasing the probability of hit (pH) on the wheels, tracks, running gear, engine and transmission of a passing vehicle. The mine is triggered by a General Assembly Resolution #356 "Landmine Safety Protocol" compliant advanced sensor/logic system with target discrimination, remote activation/deactivation and self-neutralisation/self-destruct functions to minimise danger to combatants and non-combatants. It is victim-activated by an electronic fuze with a seismic sensor to detect and classify approaching targets and a magnetic influence sensor to trigger the mine at the optimum point for maximum effectiveness. It can be manually laid by sappers or automatically by mine-laying equipment e.g., a towed trailer with mechanical plough as a surface or buried mine, and dispensed from helicopter, aircraft, multiple launch rocket and artillery-based delivery systems as a scatterable area denial mine. The mine is stabilised during free fall by a detachable nylon fabric cover and on landing is orientated by a spring actuated rectangular wire frame on the underside. The mine can be employed as a force multiplier in conventional minefields combined with more powerful anti-armour mine types e.g., pressure actuated non-metallic blast effect mines and Munroe effect shaped-charge liner (SCL) mines, and sensor-fuzed stand-off mines which launch top-attack minelet submunitions.
The M124A1 was developed to address the increasing armour protection levels of modern armoured fighting vehicles requiring ever larger (and therefore heavier) explosive charges to defeat multiple layers of thick composite and armoured plate and other heavy armoured vehicles incorporating V-shaped blast-deflecting hulls. By emphasising M-kills (mobility kills over K-kills (catastrophic kills) it made it possible to create a lighter and more rapidly emplaceable scatterable mine. It can be used to create complex obstacle belts to block enemy manoeuvre and to canalise enemies into preprepared kill zones for engagement by other direct fire weapons. The long effective length of the bar mine reduces by half the coverage density compared to circular mines with no degradation in hit probability. When manually emplaced it can be combined with a M123A1 'Kopis' directional anti-personnel mine as an anti-handling device to prevent disturbance, tampering or neutralisation.
The mine has a parallelepiped body with a semi-circular top and flat bottom profile formed from four gutter-shaped self-reinforcing honeycomb claddings moulded from high-impact polystyrene (HIPS) that offer high mechanical performance including impact resistance on hard compacted earth, insensitivity to high and low temperatures, and resistance to corrosive chemicals and liquids. The mine body is fully sealed against salt water immersion to a depth of 150 cm, and dirt, dust, mud and sand ingress to a depth of 50 cm, suitable for beach zone (BZ) and surf zone (SZ) anti-invasion defence. The kill mechanism is contained in an axial channel consisting of a long horizontal sheet of castable Composition H6 (RDX/TNT/Al mix) high blast explosive (HBX) press fitted between a linear back plate and bi-apex angle V-notch front plate. The main charge creates a Misznay–Schardin or platter effect on detonation that focuses the blast wave perpendicularly from the surface of the explosive. The energy is concentrated by small and large apex angles of the notched plate which deforms it into a self-forging fragment that is projected upwards at high speed towards the target.
The mine is victim-activated by an electronic programmable influence fuze with ultra-low-power 8-bit microcontroller (MCU) digital correlator processing the input from two microelectromechanical system (MEMS)-based digital sensors - an accelerometer-based seismic sensor and transducer-based magnetic field sensor. In a two-stage verification process it discriminates the seismic (rumble) signature of valid targets from a parametric library stored in Flash memory and activates the detonator on disturbance of the magnetic field by a ferromagnetic object. The fuzing system corporates an 8-bit radio frequency (RF) chip for remote arming and disarming and is energised by a lithium button cell primary battery system. Manual arming in the field is accomplished by the removal of two safety pins and the pulling of an internal safety lever on the underside. The mine has a 20-minute arming delay and self-destruct (SD) timer with selectable 24-hour, 10-day, 40-day or 80-day activity period for self-neutralisation to remove it as an unexploded ordnance (UXO) hazard. The charge is initiated by a highly reliable exploding foil initiator (EFI) slapper detonator as part of an interrupted explosive train hardened against premature/undesirable initiation by magnetic and electric impulses and blast overpressure clearing methods.
Etoile Arcture Ground Forces
Etoile Arcture
Armée de Terre Corps des Marines
Arcturia
Imperial Army Imperial Marine Corps Imperial Aeromarines
Korrodos
Fortress State Ground Defence Force Fortress State Royal Marine Corp
Animarnia
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Case material: high-impact polystyrene thermoplastic
Shape: rectangular bar mine
Mine action: self-forging fragment
total weight: 7.26 kg (16 lb)
Explosive content: 2.72 kg (6 lb) of Composition H6
Length: 1.4 m (55⅒ in)
Width: 11 cm (4⅓ in)
Height:8.13 cm (3⅕ in)
Fuze: dual seismic and magnetic
Waterproofing: submersion up to a maximum depth of 1.5 m (4 ft 11 in)
Operational temperature range: -40 to +50°C
Unit replacement cost: US$90
