The CFDM-4 functions as an area-denial mine that weaponizes rapid thermal collapse rather than explosive fragmentation. When triggered, the device releases a supercooled liquid nitrogen–fluorocarbon suspension under high pressure, generating a localized temperature drop of approximately -140°C within a 5-meter radius in under 300 milliseconds. The initial cold burst is sufficient to induce thermal shock fracturing in exposed biological tissue, hydraulic lines, pneumatic systems, and certain grades of ballistic polymer armor. Materials that survive the cold phase are then subjected to a secondary micro-explosive disbursement — small shaped charges embedded in the mine casing fire outward, turning any ice-crystallized surface in the blast radius into a secondary fragmentation field.

The two-phase kill mechanism — freeze, then shatter — was pioneered by ZHENG-DAO BIOELECTRIC's materials warfare division, originally as a method for disabling cryogenically sensitive bioelectric infrastructure without fire risk. The military application emerged when field engineers noted that the suspension compound caused catastrophic embrittlement in articulated armor joints and cybernetic limb housing. A target who survives the cold burst is often physically immobilized by seized joint systems, making the mine effective as both a lethal and incapacitation device depending on range.

On GLMZ's black market, 'Coldsnap' mines are prized by teams operating against heavily augmented targets — the embrittlement effect is disproportionately effective against high-density cybernetic installation. Veterans of the corporate border wars describe the aftermath of a CFDM-4 detonation as 'a room full of broken statues,' a description that has become part of the weapon's grim mythology.