Mapmakers Technology Reference

White EVA Pistol Chassis

A stockless, insulated pistol housing built for deliberate two-handed control through pressurized spacesuit gloves in vacuum and low-gravity operations.

  • Small-arms accessory platform
  • Pressurized-glove interface
  • Fictional 2040s equipment
  • Lunar and spacecraft operations

Equipment class: EVA-compatible pistol chassis

Operational host: Unmodified Glock 45 (9×19 mm)

Training host: Red inert Glock-shaped insert

Form: Stockless, two-handed

Primary interface: Two large protected whole-hand grips

Sighting: Red-dot optic; later helmet-linked camera

Environment: Qualified for exterior use within Mapmakers canon

Manufacturer and proprietary model number: Not established

What the chassis does

The chassis adapts a conventional service pistol to the reduced dexterity and hand strength available inside an EVA suit. Rather than asking a pressurized glove to operate a small trigger directly, the housing presents larger protected gripping surfaces. The original Glock remains a separate, removable weapon.

Unlike a pistol-to-carbine conversion, the housing has no shoulder stock. It is held with both hands in front of the helmet and integrates with the suit’s retention and display equipment.

Insulated structure

The fictional chassis uses two concentric aircraft-grade aluminum shells separated by a vacuum gap, with low-conductivity, vacuum-rated polymer supports connecting the layers. The inner structure secures the pistol while allowing its normal functioning; the outer structure carries the controls, accessory mounts and tether attachment points.

A durable, low-outgassing white exterior finish improves visibility and inspection and reduces solar heat absorption relative to a dark finish. The vacuum gap limits gaseous heat transfer, but does not eliminate heat conducted through supports or exchanged by radiation.

Glove-compatible control interface

Two enlarged, shrouded whole-hand controls separate enabling the system from issuing a firing input. The forward grip serves as the mechanical enabling control; the rear grip provides the firing input through a linkage to the host pistol’s existing trigger. The pistol’s factory fire-control components and internal safeties remain in place.

This pressure-glove interface is a distinctive fictional design. Its reliability, safe operation and handling are treated as qualification requirements, not as independently measured performance claims.

Optics, illumination and retention

The outer housing carries a red-dot sight, a white weapon light, a switchable red aiming laser and multiple hard tether attachment points. Later configurations add a chassis-mounted camera transmitting a weapon-aligned image to the wearer’s helmet display. This supports aiming without forcing the rigid helmet directly behind the optical sight; the red-dot remains an independent backup if the video system is unavailable.

The camera transmits an aiming view. It does not independently identify targets or authorize firing.

Operational and training configurations

One chassis family accepts an operational Glock 45 or a clearly marked red inert Glock-shaped training insert. The inert configuration supports movement drills and, in later versions, instrumented simulated engagements without placing a live pistol in the training apparatus. The external grip architecture remains recognizably the same across these configurations.

Exposure, servicing and storage

The chassis is carried outside for assigned operations and qualification, not stored permanently on the lunar surface. After exterior use, the equipment passes through station dust-control procedures. Indoors, personnel remove and clear the host pistol, inspect the equipment and perform appropriate cleaning and lubrication before returning the pistol, chassis and magazines to climate-controlled armory storage.

This cycle reduces accumulated lunar-dust contamination and prolonged thermal-vacuum exposure. It does not remove the requirement that mechanisms and materials remain suitable for the full duration of each exterior operation.

Real-world engineering context

The META Tactical APEX offers a useful real-world comparison for externally actuating an enclosed handgun’s existing trigger through a mechanical linkage. The Micro Roni Gen 4X and CAA MCK EVO illustrate external pistol-housing and accessory-mounting approaches. None is an EVA-rated equivalent or an established in-universe manufacturer of this chassis.

In the 2014 Acta Astronautica study “Effects of EVA spacesuit glove on grasping and pinching tasks”, the tested pressurized Orlan-DM glove significantly reduced grasping and pinching force compared with barehanded performance. The experiment helps explain the need for large, deliberate glove controls; it does not constitute an independent test of the fictional chassis.

Canon and qualification note

Fictional engineering: The configuration, thermal housing, control interlock, EVA qualification, instrumented training insert and helmet-view integration are elements of the Mapmakers setting. The manufacturer, exact mass, operating-temperature limits and independent test results have not been specified. The real products above are engineering analogues, not licensed source designs.

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