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Zheng-Dao Heavy Industries Thunderhead ZD-20 'Cloudburst'

A man-portable grenade launcher system that fires programmable airburst munitions capable of detonating at a precise distance from the launcher. The Thunderhead's BCI integration allows the operator to designate an airburst point in three-dimensional space, and the munition detonates at that exact coordinate regardless of intervening obstacles.

Zheng-Dao designed the ZD-20 to defeat the problem of targets hiding behind cover — rather than penetrating the cover, the Cloudburst launches a grenade over or around it, with the airburst point set behind the obstacle. The BCI-programmed fuze measures distance from the muzzle and detonates at the designated range, producing a lethal fragmentation radius of 5 meters.

The Thunderhead is fed from a revolver-style 6-round cylinder, and each round can be independently programmed with a different airburst distance. An experienced operator can engage six different targets at six different ranges in under 10 seconds, placing fragmentation behind cover at each point.

name

Zheng-Dao Heavy Industries Thunderhead ZD-20 'Cloudburst'

aliases

Cloudburst
ZD-20
Thunderhead
Storm Front

category

support

manufacturer

ZHENG-DAO HEAVY INDUSTRIES

tier availability

Tier 3+

legality

Licensed — military and corporate security forces

base technologies

Programmable airburst fuze technology
BCI-designated detonation point control
Revolving cylinder feed system

specifications

caliber: 25mm programmable airburst grenade
effective_range: 50-400 meters (airburst), 600 meters maximum trajectory
rate_of_fire: Semi-automatic, 1 round per 1.5 seconds
capacity: 6-round revolving cylinder
weight: 6.8 kg loaded
power_source: BCI-programmed fuze, no additional power

tactical use

The Cloudburst neutralizes the defensive advantage of cover. Operators designate airburst points behind walls, inside rooms through windows, and above rooftop positions. The weapon transforms every piece of cover into a potential kill zone — defenders who believe they are protected discover that the fragmentation arrives from above or behind. In urban operations, the Thunderhead is often paired with a conventional support weapon that forces defenders into cover, allowing the Cloudburst operator to engage them in their 'safe' positions.

cultural context

The Thunderhead has changed the way defenders think about cover in GLMZ's urban environment. The old rule — get behind something solid and you survive — no longer applies when grenades can be programmed to detonate behind your wall. Architectural firms have begun designing defensive positions with overhead protection as standard, and personal shelter products now advertise '360-degree fragmentation resistance.' Zheng-Dao markets the ZD-20 with the tagline 'Nowhere to hide.'

known users

Zheng-Dao corporate assault forces
Urban warfare specialists

story hooks

A Thunderhead operator programmed an airburst point inside a residential apartment, killing a family that was sheltering during a corporate engagement. The operator claims their BCI was hacked and the detonation point was moved. The weapon's flight recorder has been confiscated by corporate investigators.
Zheng-Dao is developing a thermobaric airburst round for the Thunderhead — a munition that combines fragmentation with a fuel-air explosion. Field tests have been conducted in unpopulated sectors, but the blast effects exceeded projections by 300%.

ammunition type

25mm programmable airburst grenade

related entities

Alper Holmberg-Dembele
Alper Lebedev-Tutu
Carrion Defense Works Autonomous Perimeter Defense Ecosystem
Crucible Industries CT-X 'Gauntlet'
GLMZ
Iowan Behemoth — 'Thunderhead'
Nika Svensson-Kone
Tethered Orbital Reconnaissance and Suppression Drone TORSD-7 'Kitestring'
Vantablack PA-1 'Pacifier'
Zheng-dao Bioelectric

physical description

visual profile	A brutalist, angular grenade launcher with a distinctly Chinese industrial aesthetic. The Thunderhead presents as a compact, muscular system dominated by a revolving cylinder drum mounted horizontally beneath a short, flared barrel. The overall silhouette suggests controlled violence — minimalist, purposeful, with no wasted geometry. The weapon sits low in the hand, betraying its support-weapon classification through sheer mechanical confidence.
dimensions	Overall length: 68 cm. Barrel length: 22 cm. Cylinder diameter: 8 cm. Width across cylinder: 12 cm at widest point. Height from grip to top rail: 16 cm.
weight description	Hefty and substantial — 6.8 kg loaded feels like genuine heft in the shoulder, but the weight distribution is forward-biased toward the cylinder, making it feel balanced rather than nose-heavy. The gun demands respect and deliberate movement.
primary material	Reinforced titanium-steel alloy frame with polymer composite furniture. The cylinder is precision-machined steel with visible chamber walls. Rail systems are hardened steel.
finish	Matte gunmetal gray with strategic brushed-steel accents on the cylinder and breech face. The polymer handguard and grip are textured anthracite with subtle iridescent wear marks suggesting field use. Exposed mechanical surfaces show micro-weathering consistent with field maintenance.
color scheme	Primary: gunmetal gray with charcoal undertones. Accents: brushed steel (cylinder faces, breech), anthracite polymer (grips, handguard). Minimal branding in white stencil. BCI interface panel features faint cyan luminescence in the charging handle area.
grip texture	The pistol grip is deeply textured thermoplastic polymer with aggressive radial ribbing — designed for tactical gloves. The handguard is wrapped in a thin, bonded rubber coating with directional grip patterns. The charging handle is knurled steel with a subtle curve.
distinctive features	Six visible, individual breech-loading chambers in the revolving cylinder — each can be independently toggled open A sleek charging handle integrated into the right side of the receiver, with subtle detent notches Integrated BCI interface: a small hexagonal panel on the left rail with recessed touch-points and faint cyan LED indicators (orange when armed, cyan when standby) A short, flared muzzle brake with four symmetrical ports, designed to manage recoil from airburst rounds Picatinny rail on top and bottom for mounting optics, fire-control modules, or sensor packages Heat vents cut into the front of the handguard in a radiating chevron pattern Mechanical round-counter dial on the cylinder body, marking each of the six positions A manual safety lever integrated into the trigger guard, marked with Chinese characters and Φ currency symbol (indicating military contract origin)
manufacturer markings	ZHENG-DAO HEAVY INDUSTRIES embossed in small white stencil on the left side of the receiver, just forward of the trigger guard. A serial plate (brushed aluminum) is affixed above the magazine well. The left rail bears laser-etched manufacturing date and batch code. Military contract stamps appear on the cylinder body.
condition typical	Well-maintained and field-proven. The matte finish shows subtle micro-scratches consistent with tactical deployment — no deep gouges, indicating careful handling by trained operators. The polymer shows faint discoloration from sweat and environmental exposure. All mechanical systems appear tight and precise. This is a weapon that has seen use but is meticulously maintained between operations.

image prompt

Product photography of the Zheng-Dao Thunderhead ZD-20 'Cloudburst' grenade launcher. The weapon rests on a matte black titanium surface, positioned at a slight three-quarter angle to showcase the revolving cylinder and flared muzzle. A gloved hand (tactical black polymer glove, fingers extended) grips the weapon from the right, with the trigger finger positioned outside the guard. Dramatic side-lighting from the left casts the cylinder and breech in sharp relief, revealing the brushed-steel chamber faces and mechanical precision. The BCI interface panel glows with faint cyan LEDs against the anthracite polymer. Background: deep matte black with subtle geometric grid pattern suggesting a corporate armory or testing facility. Foreground: subtle depth-of-field blur on ammunition rounds (visible 25mm grenade shells in a ammunition block to the left). The lighting emphasizes the industrial brutalism of the design — no softness, all precision and purpose. Neo-noir urban aesthetic: cool color temperature, high contrast, metallic sheen on exposed steel surfaces, subtle chromatic aberration on the edges. 35mm equivalent lens focal length. --ar 3:2 --v 6

visual prompt