The TSG-4 operates by suspending micronized thermite particles within a viscous aerogel matrix that is ejected outward at detonation rather than simply igniting in place. On trigger activation, a piezoelectric initiator fractures the inner housing and simultaneously ionizes the aerogel medium, causing the thermite suspension to disperse in a controlled radial bloom before secondary ignition commences. This sequence delays the burn by approximately 0.4 seconds — long enough for the gel to adhere to surfaces, personnel, and machinery before the 2,500-degree Celsius reaction begins.

What distinguishes the TSG-4 from legacy incendiary grenades is its adhesive burn behavior. Standard thermite burns downward under gravity; the aerogel matrix holds the reaction in place regardless of surface angle, making it equally effective against vertical bulkheads, overhead infrastructure, and horizontal targets. The burn cannot be extinguished by conventional suppressants — the thermite provides its own oxidizer — and penetrates most civilian-grade armor plating within three to five seconds of contact.

Manufactured under contract for GLMZ's internal security forces, the TSG-4 has since leaked widely into the black market through supply chain theft at ARCTURUS DEFENSE SOLUTIONS distribution nodes. Street operators call it the 'Slag Egg' for the faint yellow residue it leaves on concrete after burnthrough. Its reputation for destroying entire rooms of electronic infrastructure has made it a preferred tool of corporate saboteurs.