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Zheng-Dao Heavy Industries Dragon Gate DG-4 'Gatekeeper'

A vehicle-mounted rotary railgun that fires 4mm tungsten rounds at 2,000 rounds per minute. The Dragon Gate is designed for mounting on armored personnel carriers, ground-effect vehicles, and defensive turrets, providing devastating sustained fire against both personnel and light armor.

Zheng-Dao's engineering philosophy for the DG-4 prioritized sustained fire capability over peak performance. The weapon's six-barrel rotary system distributes heat and electromagnetic stress evenly, allowing a continuous 30-second burst that fires 1,000 rounds before requiring a 10-second cooling cycle. The electromagnetic launch system eliminates the need for propellant, and the 4mm tungsten rounds are compact enough to carry in quantities that make ammunition conservation unnecessary.

The Gatekeeper has become the standard suppression system for corporate armored columns in GLMZ. When a DG-4 opens fire, the concentrated stream of hypervelocity tungsten transforms cover into concealment and concealment into nothing.

name

Zheng-Dao Heavy Industries Dragon Gate DG-4 'Gatekeeper'

aliases

Gatekeeper
DG-4
Dragon Gate
The Turnstile

category

support

manufacturer

ZHENG-DAO HEAVY INDUSTRIES

tier availability

Tier 5

legality

Military restricted — vehicle-mounted weapons authorization

base technologies

Six-barrel rotary electromagnetic acceleration
Sustained hypervelocity fire management
Vehicle power integration

specifications

caliber: 4mm tungsten
effective_range: 200-1,500 meters
rate_of_fire: 2,000 rounds per minute
capacity: 4,000-round hopper
weight: 120 kg (weapon), 180 kg (ammunition hopper)
power_source: Vehicle power bus, draws 200kW during sustained fire

tactical use

The Gatekeeper is deployed as a vehicle weapon system for convoy escort, perimeter defense, and area denial. Its extreme rate of fire creates a physical wall of tungsten that nothing personnel-portable can survive. Vehicle commanders use the DG-4 to establish fire corridors during movement, sweeping potential ambush positions with sustained bursts that deter or destroy threats before they can engage. Against structures, the concentrated fire can breach reinforced walls within seconds.

cultural context

The DG-4's distinctive sound — a high-pitched electromagnetic whine followed by the tearing-fabric noise of hypervelocity impacts — has become one of GLMZ's most feared sounds. Ground-level communities near corporate transit corridors have developed informal warning systems based on the sound of DG-4 fire. The weapon is so destructive that its deployment in residential areas has been condemned by humanitarian organizations that Zheng-Dao's legal team routinely ignores.

known users

Zheng-Dao corporate military
ARCTURUS DEFENSE SOLUTIONS armored divisions

story hooks

A DG-4 was ripped from a destroyed APC and jury-rigged for ground emplacement by a Tier 2 militia. They lack the power supply to run it at full rate, but even at quarter speed it has created an impassable killzone that corporate security cannot approach.
Zheng-Dao is developing a man-portable version of the Dragon Gate — a back-mounted system that reduces the rate of fire but allows a single operator to carry the destructive potential of a vehicle weapon. Field trials have resulted in three operator fatalities from power system failures.

ammunition type

4mm tungsten

related entities

Arcturus Defense Solutions
GLMZ
Glenville Sound
Nika Svensson-Kone
Saoirse Mwamba-Drăghici
TESSERA ES-4 'Perimeter'
Tessera Nexus Town Car
Toll Collector
Vantablack FH-20 'Convoy'
Zheng-dao Bioelectric

physical description

visual profile	A brutal six-barrel rotary assembly mounted on a heavy gimbal cradle. The weapon presents a predatory, forward-facing silhouette dominated by the cylindrical barrel cluster—thick, purposeful, and mechanically exposed. The overall form reads as pure industrial violence: a compact block of engineering optimized for sustained suppression rather than precision.
dimensions	Barrel assembly: 85cm length, 32cm diameter (six-barrel cluster). Weapon mounting cradle: 120cm wide × 95cm tall × 60cm deep. Ammunition hopper: 140cm tall, cylindrical, 70cm diameter
weight description	Brutally heavy. The 120kg weapon assembly feels anchored—immobile without mechanical assist. The 180kg ammunition hopper exerts constant downward pressure on its mount. Requires vehicle-class power and structural integration; dead weight in any context but its intended role.
primary material	Chromium-molybdenum steel frame and barrel assembly. Tungsten-reinforced acceleration coils within the rotary hub. Polymer composite housing for electronics and thermal management vanes.
finish	Industrial matte gray with thermal-reactive coating that darkens under sustained fire. Bare metal in wear spots where ammunition feed mechanisms operate. Scorch marks and micro-fractures from electromagnetic pulse cycling visible on barrel lips.
color scheme	Steel gray primary with gunmetal accents. Thermal indicator bands (orange, red) on the barrel cluster show heat progression. Zheng-Dao corporate yellow safety striping on the ammunition hopper and electrical connector points.
grip texture	Vehicle-mounted—no personal grip. Aim controls feature rubberized pressure pads for gunner's remote trigger interface. Ammunition feed handle is bare steel, scored with grip wear from loader repetition.
distinctive features	Six parallel barrels arranged in tight cluster, each with visible cooling fins Rotary hub bearing scars and electromagnetic coil casings Ammunition feed system with exposed tungsten round magazine visible through transparent polymer carousel section Thermal expansion joints visible between barrel assembly and cradle Gimbal-mounted on heavy reciprocal dampers—designed to absorb recoil spread across vehicle chassis Electrical connector port flush-mounted for vehicle power integration, armored against foreign objects Mechanical ammo counter with digit readout on hopper side Heat vents arranged radially beneath barrel cluster, darkened from repeated thermal cycling
manufacturer markings	Zheng-Dao Heavy Industries corporate seal (stylized gate/archway) stamped on the cradle's right side. Serial plate mounted on the rotary hub housing. 'DRAGON GATE DG-4' embossed in Mandarin and Latin script on the left barrel shroud. 'VEHICLE MOUNT ONLY' warnings laser-etched on the ammunition hopper in three languages.
condition typical	Field-hardened. Copper scorch marks around barrel exits from tungsten plasma residue. Ammunition carousel typically shows 60-80% fill. Structural components display micro-corrosion from thermal cycling and electromagnetic weathering. Gimbal mounts show grease accumulation and dust coating. Fully functional but perpetually battle-worn—this is a tool that lives in suppressive fire duty.

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Professional weapons catalog photograph: Zheng-Dao Dragon Gate DG-4 rotary railgun mounted on vehicle gimbal cradle, shot from low three-quarter angle emphasizing the six-barrel cluster. Dark matte steel with scorch marks and thermal damage visible. Tungsten-gray ammunition hopper mounted behind, 40% rounds visible through carousel window. Dramatic side-lighting from upper left reveals heat scorch patterns and electromagnetic coil housings. Blurred corporate facility background with industrial bokeh. Shot on tactical measurement grid for scale reference. Cool color grading with orange thermal indicator bands pop against gray palette. --ar 3:2 --v 6

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