Street Custom 'Cigarette' Pen Gun

improvised firearm

Arcturus Defense Solutions Crowd Control SMG ACSM-3 'Shepherd'

smg

Tessera Neural Assault System TNAS-1 'Puppeteer'

assault_rifle

Ablative Charge Disruption Rifle ACDR-2 'Sandpaper'

cyber

Acoustic Cavity Resonance Pistol ACRP-2 'Hollowpoint'

exotic

Acoustic Marrow Shear Rifle AMSR-6 'Tutor'

exotic

Arcturus Defense Solutions Concussive Breach Charge CBC-3 'Knocker'

explosive

Arcturus Defense Solutions Cryogenic Projector CP-4 'Frostbite'

energy

Arcturus Defense Solutions Directed EMP Rifle DER-5 'Blackout'

electromagnetic

Arcturus Defense Solutions Graviton Shield Projector GSP-1 'Aegis'

heavy

Arcturus Defense Solutions Kinetic Denial System KDS-4 'Bouncer'

heavy

Arcturus Defense Solutions Kinetic Impactor Round KIR-10 'Hammerfall'

rifle

Arcturus Defense Solutions Pulse Carbine PC-6 'Heartbeat'

electromagnetic

Arcturus Defense Solutions Orbital Strike Designator OSD-1 'Finger of God'

heavy

Arcturus Defense Solutions Microwave Area Denial MAD-3 'Sunburn'

energy

Arcturus Defense Solutions Magnetic Accelerator Rifle MAR-8 'Longbow'

rifle

Autonomous Swarm Dispersal Unit ASDU-3 'Locust'

drone

Autonomous Ferrofluid Denial Platform AFDP-2 'Tidemark'

drone

Arcturus Defense Solutions Thermal Lance TL-9 'Sunstroke'

energy

Autonomous Adhesive Denial Drone AADD-2 'Barnacle'

drone

Axiom Systems Biometric Lock Rifle BLR-3 'Personal'

rifle

Autonomous Swarm Dispersal Unit ASDU-4 'Locust'

drone

Axiom Systems Cognitive Grenade CG-1 'Brainstorm'

electromagnetic

Axiom Systems Perception Filter Rounds PFR-1 'Blind Spot'

exotic

Axiom Systems Synapse Interruptor SI-3 'Stutter'

electromagnetic

Axiom Systems Cortical Bomb CB-1 'Leash'

cyber-integrated

Axiom Systems Neural Disruptor ND-2 'Migraine'

electromagnetic

Ballistic Resonance Carbine BRC-6 'Kettledrum'

firearm

Axonal Stretch Resonance Lance

firearm

Bioelectric Cascade Charge

explosive

Barometric Implosion Carbine BIC-5 'Sinkhole'

cyber

Bioelectric Induction Lance BIL-3 'Lamprey'

melee

Biometric Denial Charge BDC-1

explosive

Bioluminescent Acoustic Disruptor BAD-2 'Choral'

exotic

Capillary Disruption Pistol CDP-2 'Bruiser'

firearm

Biophotonic Retinal Cascade Emitter BRCE-5 'Flashpoint'

energy

Carrion Defense Works Bone Saw BS-3 'Butcher'

melee

Capacitive Nerve Induction Lance CNIL-1 'Threadneedle'

energy

Carrion Defense Works Fragmentation Sleeve FS-2 'Shrapnel Hug'

explosive

Carrion Defense Works Entropic Shotgun ES-4 'Ragnarok'

shotgun

Carrion Defense Works Hemorrhage Rifle HR-6 'Bloodletter'

rifle

Carrion Defense Works Nerve Agent Micro-Dart System NAMDS-1 'Whisper'

exotic

Carrion Defense Works Miasma Projector MP-5 'Plague Bearer'

chemical

Carrion Defense Works Marrow Drill MD-7 'Dentist'

pistol

Carrion Defense Works Necrotizing Agent Sprayer NAS-2 'Rot'

chemical

Carrion Defense Works Ricochet Pistol RCH-1 'Billiard'

pistol

Carrion Defense Works Neural Lash NL-3 'Agony'

cyber-integrated

Carrion Defense Works Pathogen Delivery System PDS-4 'Typhoid'

chemical

Catalytic Aerosol Mortar CAM-3 'Lungful'

explosive

Catalytic Vapor Dispersal Charge CVDC-5

explosive

Cavitation Pulse Carbine CPC-2 'Bends'

firearm

Catalytic Interstitial Desiccation Drone CIDD-3 'Husk'

drone

Catalytic Spore Dispersal Drone CSDD-3 'Mulch'

drone

Cavitation Pulse Knuckles CPK-5 'Bloodwater'

melee

Cerulean Phosphene Projector CPP-3 'Phantom Light'

exotic

Cochlear Resonant Hemorrhage Projector

cyber

Coherent Thermal Excitation Rifle CTER-7 'Ashmaker'

energy

Coherent Radiation Scalpel CRS-7 'Suture'

energy

Corneal Piezoelectric Delamination Pistol

cyber

Cryogenic Dendrite Scatter Cannon CDSC-4 'Frostbite'

exotic

Coronal Discharge Projector CDP-9 'Sunburn'

exotic

Cortical Bleed Emitter CBE-4 'Lacuna'

cyber

Counter-Personnel Loiter Munition CPLM-7 'Patience'

drone

Crystalline Synovial Pressure Rifle CSPR-2 'Kneemaker'

exotic

Cryogenic Fracture Disbursement Mine CFDM-4

explosive

Dermal Induction Flayer DIF-2 'Saltwater'

exotic

Cryogenic Pressure Emitter CPE-2 'Frostbite'

energy

Dielectric Filament Anchor Drone DFAD-1 'Cobweb'

drone

Dielectric Hemorrhage Emitter DHE-4 'Blister'

energy

Dielectric Phase Inversion Glove DPIG-4 'Secondskin'

exotic

Dielectric Vitreous Humor Agitator DVHA-2 'Snowglobe'

exotic

Electrochemical Dissolution Sprayer EDS-2 'Lacquer'

exotic

Directed Overpressure Charge

explosive

Directed Oxidation Lance DOL-3 'Rustmaker'

cyber

Electrokinetic Pulse Drone EPD-3 'Thunderhead'

drone

Electrochemical Vapor Seeding Drone EVSD-4 'Rainmaker'

drone

Electrolytic Bone Density Projector EBDP-4 'Chalk'

energy

Electrostatic Adipose Polarization Drone EAPD-2 'Render'

drone

Electromagnetic Overpressure Charge EOC-8

explosive

Electrostatic Dermal Adhesion Projector

exotic

Electromagnetic Pulse Grenade EPG-5 'Deadstop'

explosive

Electrothermal Chemical Carbine ETCC-5 'Flashpoint'

firearm

Electrothermal Compression Lance ETCL-9 'Ironlung'

energy

Electrostatic Needle Array Rifle ENAR-3 'Porcupine'

firearm

Electrostatic Flensing Projector EFP-1 'Skinreader'

energy

Endolymphatic Pressure Cascade Rifle

exotic

Endothermic Synovial Disruption Rifle ESDR-1 'Lockjaw'

energy

Endocrine Cascade Volatilization Lance ECVL-5 'Burnout'

cyber

Ferroelectric Shatter Sidearm FESA-2 'Gravel'

exotic

Ferrofluid Induction Cannon FIC-6 'Ironbloom'

energy

Ferrofluid Dermal Infiltration Drone FDID-6 'Ironblush'

drone

Entropic Dielectric Pulse Emitter EDPE-5 'Candle'

energy

Galvanic Myofibril Lash

melee

Galvanic Marrow Projector GMP-1 'Marrowbone'

cyber

Galvanic Interstitial Fluid Displacement Lance

exotic

Galvanic Disruption Gauntlet GDG-2 'Palsy'

melee

Galvanic Periosteal Fatigue Emitter GPFE-4 'Hairline'

exotic

Galvanic Vapor Diffusion Pistol GVDP-1 'Saltlick'

exotic

Gauss Flechette Repeater GFR-3 'Needlerain'

firearm

Gravimetric Induction Pistol GIP-4 'Undertow'

energy

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Osmotic Pressure Blade

The Osmotic Pressure Blade is a combat knife developed by Helix Biosystems as a counterintelligence and targeted neutralization tool, distinguished by its hollow ceramic blade construction and an integrated osmotic delivery system embedded in the handle. The blade is permeated by a network of semi-permeable micro-channels connected to a pressurized reservoir in the grip. Upon penetration of biological tissue, the weapon's passive osmotic differential — established by a hyperosmotic solution in the reservoir — draws interstitial fluid from the wound site inward while simultaneously pushing a controlled dose of the reservoir compound outward through the channel network and into the surrounding tissue.

The genius of the OPB-3's design is that it does not rely on injection mechanisms or active pumps — the osmotic differential does the work, and the deeper the blade is seated in tissue, the greater the exchange rate. The reservoir compound is user-configurable: Helix Biosystems offers a proprietary line of combat-grade solutions ranging from rapid coagulants (designed for field surgery applications, the weapon's official cover purpose) to vasoactive compounds, neural disruptors, or custom biologics available through licensed Helix channels. The blade's ceramic construction makes it invisible to standard metal detection, and the reservoir is shielded against spectroscopic surface scanning.

In the field, operators describe the OPB-3 as 'a knife that doesn't stop working after you pull it out' — the osmotic compound continues diffusing through tissue for minutes to hours after a wound is closed, depending on the formulation used. This temporal displacement between the act of stabbing and the onset of the compound's effects has made the OPB-3 a favored tool for operations requiring deniability.

name

Osmotic Pressure Blade

aliases

OPB-3 'Bloom'
Bloom
The Wet Knife

category

melee

manufacturer

HELIX BIOSYSTEMS

tier availability

Black market

legality

Prohibited

base technologies

Passive osmotic pressure delivery
Semi-permeable micro-channel diffusion
Configurable biologic payload

specifications

blade length: 14 cm
blade material: Zirconia-reinforced hollow ceramic
reservoir capacity: 3.2 mL
osmotic exchange rate: 0.08 – 0.4 mL/min depending on tissue depth and formulation
detection profile: Non-metallic; reservoir shielded against surface spectroscopy
compatible solutions: Helix Biosystems Series-9 combat biologics (licensed); field-modified reservoirs documented in circulation
blade tensile strength: Rated for bone contact; brittle under lateral torque exceeding 40 Nm

tactical use

Operatives use the OPB-3 for targeted elimination with delayed onset, allowing the user to be well clear of a location before a subject becomes symptomatic. In close-protection roles, it serves as a last-resort blade that guarantees a wound is not survivable even if the initial strike is non-fatal. The ceramic construction makes it the preferred blade for facility penetration where weapon screening is a factor. Its weakness — brittleness under lateral torque — means operators train to use it exclusively with straight-thrust technique, avoiding the slashing strokes that would work with a conventional knife. Field surgeons operating in contested environments have also used the OPB-3 with legitimate coagulant reservoirs, though this is considered cover by most intelligence analysts.

cultural context

The OPB-3 exists in GLMZ's underworld as a ghost weapon — known by reputation, rarely seen, and deeply feared when encountered. Its association with Helix Biosystems, a corporation that publicly presents itself as a medical and pharmaceutical entity, gives it a particular cultural horror: the idea that a company building prosthetics and treatments is also quietly manufacturing assassination tools creates a persistent distrust of Helix's public-facing medical products. Black market reservoir compounds for the OPB-3 have created a secondary economy of biologic weapons dealers who operate under the cover of pharmaceutical supply chains. Possessing an OPB-3 in GLMZ is a capital offense in three of the city's administrative sectors.

known users

Helix Biosystems internal security and counterintelligence operatives
Corporate assassination contractors
High-tier intelligence operatives across multiple factions
Black market biologic dealers who carry them for protection
Cassiel Vorne, former Helix Biosystems research director turned fugitive

story hooks

A prominent civic official has died of what appears to be a sudden autoimmune cascade — a Helix Biosystems compound that takes 72 hours to manifest. The players have three days from the time of death to find who carried the OPB-3 into the official's last public appearance.
A batch of OPB-3 reservoirs has been mislabeled and entered the legitimate pharmaceutical supply chain — Helix Biosystems is running a covert recovery operation, and they are willing to pay extremely well for silence and return of the product.
The players come into possession of an OPB-3 with a partially expended reservoir containing an unidentified compound — a street chemist can analyze it, but the results suggest it is something Helix has not officially developed yet.

ammunition type

none

related entities

Breck Tannen
Carrion Defense Works Field Surgical Kit FSK-6
Coherent Radiation Scalpel CRS-7 'Suture'
Cryogenic Fracture Disbursement Mine CFDM-4
Eshe Pena-Baah
GLMZ
Helix Biosystems
Kenji Dahl-Conteh
Marcus Bellamy
Sterling-Nakamura Cascade Projector SN-7 'Monsoon'
SynapTech GripTrue Palmar Adhesion Implant
The Dead Channel
The Interchange
The Nearfield

physical description

visual profile	A sleek, minimalist combat knife with an unnaturally smooth aesthetic. The blade appears almost translucent under certain angles, with a faint internal network of hairline channels visible beneath the surface. The handle tapers smoothly into the blade with no traditional guard — a biomechanical elegance that reads as both surgical and lethal. The overall silhouette is that of a precision instrument rather than a traditional weapon.
dimensions	Blade length: 14 cm. Overall length approximately 26–28 cm with grip. Blade width: 2.2 cm at base, tapering to a sharp point. Handle depth: 1.8 cm, fitting flush against the palm.
weight description	Deceptively light — the hollow ceramic construction makes it weigh only 180–200 grams, giving it an almost ethereal feel in hand. This lightness is unsettling; there's no heft to anchor the user's sense of lethality, making it feel more like a surgical probe than a weapon.
primary material	Blade: Zirconia-reinforced hollow ceramic with internal micro-channel lattice. Handle/grip: Brushed titanium-polymer composite with embedded reservoir. The two materials meet seamlessly, almost invisibly.
finish	The blade has a faint pearl-white or translucent alabaster finish with subtle iridescence where light catches the internal channel network. The handle is brushed gunmetal gray with a matte non-reflective coating. No gloss anywhere — designed to avoid catchlight and visual signature.
color scheme	Primary: pale ivory-white ceramic blade with ghost-gray titanium grip. Accent: faint bioluminescent tracery visible along the micro-channels under side-light (optional internal illumination feature on some field variants, disabled on standard issue).
grip texture	The handle features a fine crosshatch texture machined into the titanium-polymer, offering minimal grip resistance — designed for a loose, relaxed hold that minimizes arm fatigue during extended operations. Where the hand naturally rests, there's subtle wavy micro-texturing suggesting ergonomic precision. Cool to the touch.
distinctive features	Visible micro-channel lattice running from the blade tip through the handle — a faint network pattern suggesting the osmotic delivery system beneath Minimal blade geometry: perfectly symmetrical cross-section, tapering to a molecular edge No crossguard or protective element — blade transitions directly into handle Small circular access port on the handle pommel (roughly 0.5 cm diameter) for reservoir refill/configuration, marked with a faint Helix Biosystems symbol Faint pressure-seal line running the length of the grip where the reservoir chamber is sealed Optional: hairline capillary ports visible along the blade's edge where the micro-channels terminate The blade's surface appears almost wet or dewy under certain lighting — an artifact of the material's semi-permeable nature
manufacturer markings	HELIX BIOSYSTEMS is etched in minimal sans-serif lettering along the grip, approximately 3 cm from the pommel. Serial number engraved on the pommel access port. No patent marks or visible warnings — deniability is built into the design.
condition typical	Black-market variants are typically pristine or show only light cosmetic wear — the ceramic doesn't scar easily, and the design discourages field maintenance. Legitimate Helix-issued models may show microscopic wear along the blade edge from stropping. Some field-modified reservoirs show signs of jury-rigged refill (discolored access ports, micro-scratches around the seal).

image prompt

Product photography of a sleek, minimalist combat knife with a translucent zirconia-ceramic blade and brushed titanium grip, positioned on black matte surface. Blade angled to catch dramatic side-lighting that reveals faint internal micro-channel lattice network running through the material. Handle features fine crosshatch texture and small pommel access port. Shot from above at 45-degree angle. Lighting: cool, hard sidelight casting deep shadows. Neo-noir urban aesthetic: clinical, surgical, biometric precision. Include subtle depth-of-field blur on background. Moody, high-contrast, minimalist composition emphasizing the blade's ethereal, non-metallic properties and barely-visible internal delivery system. --ar 3:2 --v 6

visual prompt