Gravitationally Excited Barium Accelerator

"It's not the cancer that'll kill you, it's the toxicity. That's assuming that the corrosion doesn't get you. Or having molten metal plaster the wound cavity. Or the wound cavity. Of course before that the impact could get you. Or maybe the heat first. Really, the sooner you die in the process of getting shot with a GEBA the better."

— Trooper Fenox, Wolfguard

FIELD MANUAL ENTRY: G.E.B.A. (GRAVITATIONALLY EXCITED BARIUM ACCELERATOR) Mark-7

CLASSIFICATION: Restricted | Hazardous | High-Energy Directed Kinetic System

1. OVERVIEW

The G.E.B.A. is a high-energy directed kinetic system that utilizes a precision pressor beam to compress and superheat barium powder into a vaporized state before accelerating it toward a target. This results in a highly energetic green-hued impact, causing severe thermal, kinetic, and toxic damage. Due to its hazardous nature, all operators must undergo Level 3 hazardous systems training before handling or deploying a G.E.B.A.

2. OPERATING PROCEDURES

2.1 STARTUP & FIRING

Power Activation: Ensure the weapon’s quantum matrix battery is fully charged. A minimum charge of 20% is required for safe operation.

Pressor Alignment Check: Run a diagnostic on the internal gravity pressor array. Misalignment can cause backscatter or system failure.

Ammunition Loading: Insert a standard Barium Core Canister (BCC) into the receiver. The weapon will auto-seal and begin atmospheric scrubbing to prevent barium leakage.

Safety Disengagement: Toggle the Grav-Lock to Active before firing.

Engagement & Fire Modes:

Semi-Automatic: Fires individual high-velocity barium pulses.

Burst: Releases a rapid sequence of three shots.

Suppressive Stream: Maintains continuous fire but depletes ammunition rapidly.

2.2 POST-FIRE SAFETY

Allow the barrel to cool between extended engagements to prevent overheating.

Conduct a Barium Residue Scan (BRS) on armor and equipment before holstering.

Always store spent BCCs in sealed, designated hazardous material containment units.

3. CARE & CLEANING

3.1 ROUTINE MAINTENANCE

Daily Inspection: Ensure the Grav-Lens array is free of microfractures.

After Every Engagement:

Disengage the power core and let the weapon fully discharge.

Open the receiver and inspect the Pressor Containment Rails (PCR) for warping.

Clean residual barium deposits using a sealed vacuum system—NEVER attempt to wipe residues manually.

Every 1,000 Shots:

Replace the Gravitational Excitation Lens to maintain accuracy.

Conduct a full diagnostic on the MMI synchronization module.

4. HAZARD WARNINGS & SAFETY PROTOCOLS

Barium Exposure: Inhalation or prolonged skin contact with barium residue is toxic. If exposed, immediately undergo decontamination and administer calcium-based counteragents.

Gravitational Instability: Damaged or uncalibrated pressor emitters may cause spatial distortions. Keep clear of the muzzle when charging.

Toxic Fire Hazard: Barium particulates react unpredictably with certain atmospheric conditions. Avoid use in oxygen-rich or enclosed environments without proper filtration.

5. FIELD TROUBLESHOOTING

Issue	Cause	Solution
No power-up	Depleted battery	Replace power cell or use emergency capacitor
Pressor beam misalignment	Grav-Lens failure	Realign using onboard diagnostic tool
Inconsistent accuracy	Barium feed issue	Purge and reload BCC
Overheating	Excessive sustained fire	Engage cooling cycle and cease fire
Toxic cloud formation	Residue buildup in the barrel	Perform emergency scrub cycle.

Specifications

The Gravitationally Excited Barium Accelerator (G.E.B.A.) is a high-energy weapon system that utilizes a pressor beam to compress barium powder into a superheated state before accelerating it toward a target at hypersonic speeds. Each shot vaporizes 42 grams of barium, heating it to over 2,000°C and launching it at an average muzzle velocity of 3,000 feet per second. The result is a brilliant green tracer that burns through armor, flesh, and machinery alike, leaving behind toxic and irradiated remnants. The weapon is constructed with a reinforced pressure chamber, specialized heat-resistant barrel lining, and an integrated cooling system to prevent overheating. Due to its complex firing mechanism, the G.E.B.A. requires routine maintenance, with operators needing to clear barium residue buildup to maintain performance. See Barium Core Canister below for a more detailed description.

Weapons of Wolf

The G.E.B.A. is among the signature weapons of the Wolfguard, the defense forces of the lawless Wolf System. In a region where battles range from skirmishes with raiders to engagements against autonomous war machines left behind by the X'Cess, conventional arms often fall short. The G.E.B.A. provides a solution—its high-energy projectiles are capable of breaching armored vehicles, disabling mechs, and incinerating infantry in an instant. The psychological impact of its eerie green beams and the caustic residue it leaves behind only add to its infamy. For the Wolfguard, the environmental toxicity is of little concern; on sparsely populated Wolf worlds, where survival often depends on sheer dominance, the weapon's effectiveness outweighs all drawbacks.

Restricted in Human Space

Outside the Wolf System, the G.E.B.A. is considered one of the most dangerous and inhumane weapons in circulation. Its ability to indiscriminately contaminate battlefields, along with the gruesome wounds it inflicts, has led to its classification as an LC 2 Prohibited Armament by the Speaker’s Council. However, this has not prevented black-market versions from appearing in the hands of warlords, terrorists, and organized criminals across human space. The Wolf System itself remains outside centralized control, making any attempts at arms embargoes ineffective. While most militaries refuse to use G.E.B.A.s due to their lasting environmental and biological hazards, those who do wield them know that they are carrying a weapon engineered for pure, unrelenting devastation.

GEBA Tables

Greenblast Pistol: By removing basically all of the safety features, a 'holdout' GEBA has been made. This resembles more of a sawed-off shotgun that can be hidden in a long, bulky coat rather than an actual holdout pistol. Like a Particle Blaster, firing it out of armor is dangerous. Unlike the Particle Blaster, it is toxic in addition to radioactive. Unless the wielder has access to very good healthcare, they don't have very long to live.

Barium Rifle: A civilian model allegedly made for hunting, though this would certainly have to be trophy hunting of big game, as only the most nihilistic of survivalists would be comfortable picking chips of barium out of their teeth. It features an increased range, but a five round internal magazine. The increased gravity pressure makes modifying it to take an external magazine impracticable.

GEBA Carbine: The standard Wolfguard variant of the GEBA is the GEBA Carbine Mark-7. This weapon is made for close to mid-range skirmishes, has a ten round detachable magazine, and a relatively low incidence of overheating with sustained fire. It has single shot, three round burst, and full auto capabilities

GEBA Battle Rifle: A larger 'designated marksman' variant of the Mark-7, it features increased range but only single shot and three round burst. It comes with a Smart Stock Mod as a standard (included in price)

T-19 Sanction: The T-19 Alpha Mod, AKA the T-19 Sanction, is a variant of the T-19 crew-served smartgun. Rather than thirty rounds per second of 15mm Rounds, it fires at a rate of ten rounds per second of BCC. It's notorious for overheating, but that may just be the heavy trigger fingers of the Wolfguard at play.

GEBA Scattershot: A pre-loaded six shot drum can be slotted into the back of this weapon and fired one at a time in a revolver style, or all at once with a scatter pattern similar to a shotgun.

Barium Core Canister: Ammunition for a GEBA is a crystal cannister with a copper base and a graphite tip. The cannister is filled with monomolecular barium suspended in ionized ammonia. A GEBA weapon uses gravity to catastrophically crush the crystal container and pressurize the barium and ammonia into barium and barium amide mixture. The GEBA then projects the pressor down the barrel and into a straight line until it contacts solid or liquid matter, at which point a miniscule gravity vortex occurs. The barium, which has been heated both by catastrophic compression and the reaction that created the barium amide, expands rapidly down the pressor at hypersonic speed. The effect burns as the atmosphere caught in the pressor is forced forward, which can crack armor and smash through energy shielding. Then, the energized barium hits as a brilliant green beam, slamming into the target with incredible force. Afterwards, molten barium residue remains, which is not only further heat damage but also toxic and risks further 'popping' as the barium reacts with moisture if it isn't cleaned out. What is left behind are mangled remains and a closed casket funeral. $1.50/ round, sold in boxes of 30, 90, and 300.

Beam Weapons (Pistol) (DX-4, other Beam Weapons -4, or Guns (Pistol) -2)

Manufacturer(s)	Name	Damage	Acc	Range	Weight	RoF	Shots	ST	Bulk	Rcl	Cost	BC	LC	Notes
VD, EE, MA	Greenblast Pistol	special*	2	500/1,500	3.3/2C	2	10(3)	11	-3	4	$5,600	A	2

Beam Weapons (Rifle) (DX-4, other Beam Weapons -4, or Guns (Rifle) -2)

Manufacturer(s)	Name	Damage	Acc	Range	Weight	RoF	Shots	ST	Bulk	Rcl	Cost	BC	LC	Notes
VD, EE, MA	Barium Rifle	special*	8+4	1,000/3,000	20/1.5	1	5(3)	15	-6	2	$12,000	C	2	Requires two hands
VD, EE, MA	GEBA Carbine	special*	8	750/2,250	10/9	1, 3, or 9	30(3)	15	-3	2	$40,000	D	2	Requires two hands
VD, EE, MA	GEBA Battle Rifle	special*	8+4	900/3,000	15/9	1 or 3	30(3)	10	-4	2	$18,000	E	2	Smart Stock, Requires two hands

Gunner (Beams) (DX-4 or other Gunner-4)

Manufacturer	Weapon	Damage	Acc	Range	Weight	RoF	Shots	ST	Bulk	Rcl	Cost	BC	LC	Notes
VD	T-19 Sanction	special*	7	800/2,500	25/spec	10	50 (drum) or Belt-fed	18M	-8	2	$320,000	C	1

*: Damage done by GEBA weapons (the man-portable ones, at least) is sequential; refer to the chart below. The damage begins with burn, then corr, then tox.

Order	Damage	Note
1	2d(2) burn
2	2d(4) corr	If the corrosion damage is completely blocked by DR, then treat it as crushing (cr) with the double knockback (dkb) feature.
3	1d tox	This damage only applies if the previous damages penetrated DR. This damage is a recurring damage affliction, and every round the victim must roll a HT or take the damage again. A critical failure on this roll causes a 1d burn ex roll in damage instead. A critical success ends the effect.

Final note: GEBA arounds don't overpenetrate. The pressor ends at the target, and if the shot penetrates then it becomes a toxic but otherwise harmless puff of barium dust.

Mods

Sights

From guerrilla hacks to battlefield optics, Wolfguard make every shot count.

Name	Effect	LC	Cost	Notes
Grim-Optic HUD Reticle	Integrates with Wolfguard combat visors; auto-adjusts range and windage in real-time. +2 Acc.	3	$2,000	Requires smartlink or implant interface.
Corvid Tactical Scope	4x–12x zoom with integrated heat signature overlay. Helps spot camouflaged or cloaked targets.	2	$2,200	"Named after the birds that come to feast after."
Rangefinder Spike Sight	Emits a red-range grid; grants +1 to Accuracy when bracing.	4	$250	Common for mechsnipers.
Ichor Dot Projector	Bright green dot locked to G.E.B.A.’s beam path. Can blind unshielded optics on target.	2	$500	Some squads paint skulls around it.
Low-Tech Iron Ghost Ring	Glows faintly in the dark. Basic, rugged, and never fails. Acc +1	4	$12	Used by old-school Wolfguard who say “glass breaks, steel bites.”

Pressor Mods

These refine how barium is pressurized and released — often dangerously so.

Name	Effect	LC	Cost	Notes
Overburn Chamber Coil	Increases damage by +1 per die but causes overheating on a natural 18.	3	$800	"Burns hotter, hits harder, fries faster."
Echo-Stabilized Pressor	Reduces kickback; -1 recoil.	3	$280	For sustained fire support.
Concussive Wave Liner	Converts some energy into a shockwave; adds knockback on all damage types except toxin.	2	$600	Great for crowd control… or chaos.
Silencer Baffle Mod	Dampens the G.E.B.A.'s signature scream and green trail. Treats weapon as LC 3 for concealment.	2	$1,200	“For work that doesn't make the news.”
Hex-Pattern Inductor	Slightly reduces damage, but generates a destabilizing EMP surge on hit (1-yard radius). -2 corr, turns the surge into an explosion pattern.	2	$3,500	Favored against drones and suits.

Trigger Mods

Control matters when firing a weapon that vaporizes metal.

Name	Effect	LC	Cost	Notes
Hairline Reactive Trigger	Fires on minimal pressure; grants +2 to Fast-Draw rolls.	2	$200	Notoriously easy to ND.
Staggered Pulse Trigger	Fires two rapid low-mass bursts instead of one large one. Treat as RoF 2, -1 damage per shot.	2	$320	Useful against fast-moving or unarmored targets.
Arc-Delay Circuit	Allows user to “charge” a shot for +2 damage. Takes 1 extra Ready maneuver.	4	$600	Very dramatic. Very risky.
Deadman’s Latch	Weapon continues firing for 1d seconds if user is incapacitated while the weapon is active.	2	$210	“Better you than them.”
Feedback Loop Safety	Prevents misfires by dispersing excess charge. Grants +4 to avoid critical misses.	2	$80	Heavily used in training units.

Gadgets

Every Wolfguard mod shop has a signature trick. Here's a few.

Name	Effect	LC	Cost	Notes
Integrated Hookshot	Fires a micro-grapple; 15-yardrange. Can lift 1x ST in weight.	4	$1,200	Common for climbing, breaching, or brutal melee kills.
Toxin Filter Vent	Captures barium offgas. Reduces environmental damage, treats weapon as LC 3 if scanned.	4	$850	“For PR reasons.”
Bunker Buster Bipod	Reinforced brace with shock absorption; halves recoil and doubles Acc when prone.	4	$110	“Never run from a siege.”
Autodoc Sting	Injects painkillers and coagulants into user when weapon heat exceeds threshold.	2	$330	Not legal in most militaries.
Ghostwire Transmitter	Sends signal pings with each shot to other Wolfguard units for coordinated suppression.	4	$2,000	“Shoot in rhythm, bleed as one.”

Item type

Weapon, Ranged

Related Technologies

• Gravitic Slingers
• Gravplating
• Particle Weapons

Related ethnicities

• Hellion

Critical Tables

Critical Hit Table

Roll	Effect
4	Pressor hits especially hard. Add 1d cr damage to the beginning of the damage sequence.
5, 6	Cascade Breach — The pressor pulse finds a hairline crack or vent, amplifying all subsequent layers. Burn, Corrosion, and Toxic each penetrate, ignoring 2 DR on each step.
7, 8	Searing Feedthrough — The burn layer completely liquefies surface armor, exposing internals. Corrosion damage automatically hits the next interior layer (vitals, crew compartment, etc.), regardless of DR.
9, 10	Molecular Avalanche — Corrosion effect causes chain molecular disintegration in surrounding material. Deal Corrosion damage in a 1-yard radius, halved for secondary targets (equipment, adjacent body parts).
11, 12, 13	Normal Hit
14, 15	Toxic Surge — The full sequence breaches armor and implants barium particulates directly. Target must immediately roll vs. HT-4 or suffer Toxic Shock: double toxic damage and -3 to DX and IQ for 1d×10 minutes.
16, 17	Shatter Pulse — The pressor beam aligns perfectly with the target’s structural resonance. On failed HT roll, target is stunned and drops prone (or collapses), suffering -4 to defense for the next turn.
18	Thermovascular Rupture — In a biological target, superheated blood vessels explode internally. Apply 1d Burn damage to the vitals, bypassing armor and DR. Causes automatic Bleeding (×2).

Critical Miss Table

Roll	Effect
4	Backwash Vent Failure — The pressor pulse fails to discharge properly. You take 1d burn damage and must make a HT roll to avoid radiation damage. Your armor reduces the burn but not the radiation.
5, 6	Overpressure Feedback — The barium chamber overpressurizes, damaging the internal heat buffer. The weapon becomes unusable for 1d turns as it vents violently. Anyone adjacent must roll vs. HT or be stunned for 1 turn.
7, 8	Unstable Combustion — The barium powder reacts early. A green flash erupts at the muzzle with a shriek. You are blinded (Vision -8) for 1 turn and suffer -2 DX for the next 3 turns.
9, 10	Toxic Venting — A microfracture in the barrel sprays barium particulates backward. You and anyone behind you must roll HT-2 or begin suffering toxic damage (1d every minute) unless treated or filtered.
11, 12, 13	Normal Miss
14, 15	Trigger Jammed Open — The trigger sticks in the "on" position! The weapon begins charging on its own. Spend a full turn wrestling it down. On a failed DX roll, it fires uncontrollably in a random direction.
16, 17	Core Detachment — The barium canister rattles loose mid-fire. No damage to the weapon, but the shot fizzles with a useless green cough. The loose core releases toxic vapor; you take a -2 to all rolls until it’s cleared.
18	Magnetic Coil Fracture — The pressor array shears under stress. Weapon takes 1d6 HP damage, cannot fire until repaired, and emits a high-pitched whine. You take -1 to stealth until it's fixed.