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Autonomous Adhesive Denial Drone AADD-2 'Barnacle'

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Electrochemical Dissolution Sprayer EDS-2 'Lacquer'

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Electrokinetic Pulse Drone EPD-3 'Thunderhead'

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Electrochemical Vapor Seeding Drone EVSD-4 'Rainmaker'

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Electrolytic Bone Density Projector EBDP-4 'Chalk'

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Electrostatic Adipose Polarization Drone EAPD-2 'Render'

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Electromagnetic Overpressure Charge EOC-8

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Electrostatic Dermal Adhesion Projector

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Electrothermal Chemical Carbine ETCC-5 'Flashpoint'

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Electrothermal Compression Lance ETCL-9 'Ironlung'

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Electrostatic Needle Array Rifle ENAR-3 'Porcupine'

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Electrostatic Flensing Projector EFP-1 'Skinreader'

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Endolymphatic Pressure Cascade Rifle

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Endocrine Cascade Volatilization Lance ECVL-5 'Burnout'

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Ferroelectric Shatter Sidearm FESA-2 'Gravel'

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Ferrofluid Induction Cannon FIC-6 'Ironbloom'

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Ferrofluid Dermal Infiltration Drone FDID-6 'Ironblush'

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Entropic Dielectric Pulse Emitter EDPE-5 'Candle'

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Galvanic Myofibril Lash

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Galvanic Marrow Projector GMP-1 'Marrowbone'

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Galvanic Interstitial Fluid Displacement Lance

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Galvanic Disruption Gauntlet GDG-2 'Palsy'

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Galvanic Periosteal Fatigue Emitter GPFE-4 'Hairline'

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Galvanic Vapor Diffusion Pistol GVDP-1 'Saltlick'

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Gauss Flechette Repeater GFR-3 'Needlerain'

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Gravimetric Induction Pistol GIP-4 'Undertow'

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Tessera TK-9 Proteus 'Shapeshifter'

The Tessera TK-9 Proteus is a modular semi-automatic pistol system chambered in 9x19mm, designed around a serialized fire control unit that can be dropped into multiple frame sizes and configurations. A single TK-9 purchase includes a compact carry frame, a full-size duty frame, and a subcompact backup frame — all accepting the same trigger assembly, magazine release, and fire control group.

The modularity of the Proteus extends to its barrel system. Quick-change barrels in standard, threaded, and extended lengths snap into any frame configuration without tools, allowing an operator to transform the weapon's profile in under thirty seconds. Tessera markets this as 'mission-adaptive architecture' — a single registered weapon that fills three roles.

The Shapeshifter has found particular favor among operators who cross between district tiers regularly and need to adjust their visible armament to match local customs and security expectations. A compact Proteus passes through Mid-tier checkpoints unremarked; the same fire control unit in a full-size frame with an extended barrel becomes a credible duty weapon for higher-threat environments.

Tessera Corponation

name

Tessera TK-9 Proteus 'Shapeshifter'

aliases

Shapeshifter
Proteus
TK-9

category

pistol

manufacturer

TESSERA CORPONATION

tier availability

Tier 2+

legality

Legal — single registration covers all configurations

base technologies

Modular fire control unit
Quick-change barrel system
Multi-frame architecture

specifications

caliber: 9x19mm
effective_range: 35-55 meters (configuration dependent)
rate_of_fire: Semi-automatic
magazine_capacity: 10-17 rounds (configuration dependent)
weight: 0.52-0.82 kg (configuration dependent)

tactical use

A versatile modular pistol system that adapts to different operational requirements. The compact frame suits concealed carry, the full-size frame suits duty carry, and the subcompact frame serves as an emergency backup. Operators can reconfigure the weapon between missions or even during extended operations. The trade-off is that no single configuration is as optimized as a purpose-built weapon.

cultural context

The Proteus appeals to the practically minded — people who appreciate engineering solutions and hate redundancy. In certain circles, carrying a Proteus signals adaptability and resourcefulness. Tessera's marketing leans heavily into the 'one weapon, every mission' narrative, which resonates with independent operators who can't afford separate firearms for every situation.

known users

Cross-district couriers
Independent operators
Tessera field investigators
Budget-conscious professionals

story hooks

A Proteus fire control unit is found at three separate crime scenes — in three different frame configurations. The registered owner is in a coma.
Tessera releases a firmware update for the Proteus biometric module that secretly logs location data every time the weapon is assembled.

ammunition type

9x19mm

related entities

Free Assembly
Nika Svensson-Kone
Synaptrel
Tessera Adaptive Platform TAP-5 'Chameleon'
Tessera Corponation
The Compact

physical description

visual profile	A utilitarian semi-automatic pistol with a distinctly modular architecture. The design emphasizes geometric simplicity and tool-less reconfigurability — clean lines, accessible quick-change ports, and minimal ornamentation. The fire control unit forms the visual anchor, with frame and barrel modules clicking into place around it. Appears deliberately engineered rather than organic.
dimensions	Compact frame: 16.5cm L × 3.2cm W × 11cm H \| Full-size frame: 19.2cm L × 3.4cm W × 12.7cm H \| Subcompact frame: 14cm L × 3.1cm W × 9.5cm H \| Barrel lengths: 8cm standard, 10cm extended, 7.5cm threaded
weight description	Balanced and responsive. Compact frame feels light in hand (520g), full-size has substantial but manageable heft (820g). The serialized fire control unit is the dense core; frame/barrel assemblies are relatively light, making swaps feel intuitive rather than burdensome.
primary material	Serialized fire control unit: hardened steel with precision CNC tolerances. Frame modules: aerospace-grade polymer composite with steel reinforcement inserts at wear points. Barrels: chrome-moly steel with hard-anodized finish.
finish	Satin black anodize on steel surfaces with matte charcoal on polymer. Intentionally non-reflective to minimize visual signature. Barrel threads show brushed steel where anodize thins from handling.
color scheme	Matte black primary with charcoal-gray polymer accents. Serialized fire control group marked with discrete Φ TESSERA numbering in laser-etched silver. Minimal accent lighting — optional tritium sight posts in pale green.
grip texture	Textured polymer grip with shallow diamond pattern for secure purchase without bulk. Ergonomic but deliberately utilitarian — no luxury finish. Thumb rest areas show slightly raised retention ridges.
distinctive features	Exposed quick-change barrel catch — bright-anodized silver lever beneath slide Modular frame interface: visible alignment rails and locking lugs with micro-tolerances Serialized fire control unit stamped with unique TESSERA ID and Φ conversion cost (Tier 2+ pricing) Magazine well designed for tool-free configuration swaps Ambidextrous mag release buttons with subtle textural difference for touch-identification Accessory rail on dust cover (standard and full-size frames only) Slide top milled flat for optic mounting (full-size frame standard) Wear pattern markers: faint ghost-outline indicating where barrels seat, suggesting frequent reconfiguration
manufacturer markings	TESSERA CORPORATION laser-etched along slide in angular sans-serif typeface. Fire control unit serial number stamped on frame interior — registration requirement. Small Φ symbol centered on slide rear. QR matrix code on frame rail beneath trigger guard linking to TESSERA modular parts database.
condition typical	Well-maintained. Light wear around quick-change interfaces from regular barrel swaps. Minimal corrosion due to anodize quality. Sight pictures often show minor dust in crevices from field assembly/disassembly. Operators typically keep all three frame configurations in rotation — each shows subtle individual wear patterns reflecting mission history.

image prompt

Product photograph of a modular semi-automatic pistol system showing all three frame sizes arranged in configuration hierarchy: subcompact, compact, full-size, with quick-change barrels displayed separately (standard, threaded, extended). Weapon components rest on a dark brushed steel surface under dramatic side-lighting emphasizing the geometric precision of the quick-change interfaces. Close detail of the serialized fire control unit and the bright-anodized quick-change lever catch. Matte black finish reflects light minimally; anodize gradations visible on barrel threads. Professional armory aesthetic, neo-noir military-industrial styling, 2226 Great Lakes Metropolitan Zone aesthetic. Shallow depth of field isolating fire control unit in sharpest focus. --ar 3:2 --v 6

visual prompt