The Hepatic Vapor Pressure Burst Charge is a contact explosive designed for placement on surfaces where targets are expected to rest, lean, or brace — vehicle seats, chair backs, wall panels, floor tiles. Its detonation sequence uses a ferroelectric compression initiator to generate a precisely shaped pressure wave tuned to maximize coupling with hepatic parenchymal tissue. The charge delivers its energy selectively to the liver's vascular architecture, triggering rapid vapor pressure buildup within sinusoidal spaces and causing catastrophic hepatic rupture with minimal blast damage to surrounding tissue or material.

The engineering basis for the HVPBC-2 emerged from IRONCLAD AGRISYSTEMS' agricultural research into livestock processing optimization — specifically, non-destructive pressure techniques for organ evaluation. The weaponized application was developed under a separate classified contract, though the technical lineage is visible to anyone who examines the ferroelectric compression profile. The charge is approximately the size of a playing card and 4mm thick, making it concealable within standard furnishings with no detectable profile under most security sweeps.

Targets struck by the HVPBC-2 experience an immediate sensation described by survivors as 'a punch from inside' followed by progressive right upper quadrant pain and rapid hemodynamic collapse. Because the external blast signature is minimal — a sharp crack audible only within a few meters — the HVPBC-2 is the weapon of choice for assassinations where the cause of death must appear medical. Coroners unfamiliar with the charge's signature frequently log cause of death as spontaneous hepatic hemorrhage.