Armament / PX-5171 Plasma Gun

Field Record: ARM-PX5-025Archive Node: Galactic FederationClearance: Special Projects / Level 04Review Status: Federation Prototype Weapon Record

Name: PX-5171 Plasma Gun
Classification: Federation backpack-fed plasma prototype
Procurement Code: PX-5171: Plasma Experimental weapon, 5th generation, 17-frame, revision 1
Manufacturer / Origin: Galactic Federation reverse-engineered plasma weapon program
Primary Role: Heavy charged shot, monster suppression, special-projects fire support
Firepower Rating: High plasma / very slow cycle
Primary Effect: Charged bluish-green plasma blast, armor burn, large-target trauma
Known Users: Anthony Higgs of the Galactic Federation 07th Platoon
Safety Note: Backpack charge pack is mission-critical and vulnerable to heat, impact, and forced separation
Feature Summary: Federation prototype plasma weapon retaining the common name Plasma Gun, built around a backpack charge pack, laser sight, long charge window, and a powerful single-shot plasma discharge.
Technical Profile: The PX-5171 appears to trade portability and rate of fire for a plasma output approaching charged beam performance, suggesting a reverse-engineered Federation attempt to externalize power systems that Chozo arm cannons contain internally.

Survey StatusPrototype Hardware Record

Behavior IndexHeavy Charged Plasma

Science ValueReverse-Engineering Study

Field AccessCommand Authorization Required

System Profile

PX-5171 Plasma Gun

Federation prototype plasma weapon retaining the common name Plasma Gun, built around a backpack charge pack, laser sight, long charge window, and a powerful single-shot plasma discharge.

Weapon ClassFederation plasma experimental weapon / backpack-fed heavy prototype

DamageDeals 5d8 plasma damage on a fully charged hit. A distracted, exposed, or large target may suffer +2 damage or a severe stagger rider.

Damage TypePrimary output is plasma heat and charged energy trauma, with secondary sensor flare, armor scorch, and ignition risk.

RangeReliable range is 120 meters when the laser sight has a clean lane and the operator can hold charge.

Ammo / Energy CostCosts 3 backpack charge units per shot and requires a charge window of 2 full turns before firing.

PropertiesFederation prototype, plasma, laser-sighted, backpack-fed, slow charge, heavy output, fragile support system.

Equip ModifierRequires a dedicated charge pack, reinforced harness, and operator training. Loss of the backpack pack disables charged fire.

ActivationBegin charging as an action, maintain aim through the charge window, then fire on a later action if the line remains valid.

Cooldown / ReloadAfter firing, the weapon needs 1 full turn to bleed heat and recheck the charge path before charging again.

LimitSlow charge, backpack vulnerability, line-of-sight interruption, laser-sight exposure, heat damage, and forced movement can prevent a useful shot.

Special Traits

Plasma Experimental. The PX code marks a prototype doctrine family, not standard infantry issue. Treat each deployment as command-approved testing or special-projects support.

Backpack Charge Pack. The weapon's output depends on an external pack and transfer line. If the pack is lost, submerged in magma, or damaged, the gun cannot produce full charged fire.

Laser-Sight Commitment. Aiming reveals intent before the blast. Targets may react to the sight line if they can perceive it or recognize the charge cycle.

Special Actions

Begin Plasma Charge. Spend 3 backpack charge units and begin the 2-turn charge cycle while maintaining line of sight.

Fire Plasma Gun. Release the charged shot at one visible target. Apply heavy plasma damage and any stagger rider supported by the scene.

Protect Charge Pack. Brace, reposition, or accept cover from allies to prevent impact, heat, or forced movement from breaking the charge path.

System Overview

The PX-5171 Plasma Gun is a Federation prototype weapon known in field speech simply as the Plasma Gun. Its most documented user is Anthony Higgs of the 07th Platoon, who carried the system during the BOTTLE SHIP incident as a heavy support option against threats ordinary infantry weapons could not reliably stop.

The weapon's profile is defined by imbalance. Once fully charged, it can release a powerful bluish-green plasma blast with enough effect to threaten large creatures, but reaching that moment takes far longer than a marine would prefer in a moving fight. The system therefore depends on team cover, target distraction, and operator nerve.

Its physical layout makes the prototype status obvious. The gun is paired with a backpack charge pack, implying that the Federation could reproduce plasma output only by externalizing mass, storage, and cooling that Chozo-derived arm cannon systems handle inside a far smaller architecture.

Archive records keep the common name Plasma Gun because that is how the field source identifies it, but procurement notation classifies the pattern as PX-5171: Plasma Experimental weapon, 5th generation, 17-frame, revision 1. The name and code together describe a weapon caught between battlefield nickname and laboratory inventory.

Technology And Function

The PX-5171 is plausible as a reverse-engineered plasma discharge system with a separated power reservoir, charge regulator, laser sight, and reinforced handheld emitter. The backpack exists because the weapon cannot yet compress plasma-beam power management into a normal rifle frame.

Federation procurement reads the designation as PX-5171: Plasma Experimental weapon, 5th generation, 17-frame, revision 1. The PX doctrine family marks laboratory-derived plasma hardware, while the digits identify the generation, frame standard, and early revision state used by special-projects armorers.

The long charge cycle suggests staged containment. Energy must move from the backpack through a protected transfer path, gather inside the emitter, stabilize into a coherent plasma packet, and align with the sight before discharge. Any interruption can ruin the shot or force the operator to begin again.

The laser sight is not a cosmetic attachment. It gives the operator a narrow aiming reference during a charge cycle where a missed shot wastes time, exposes the team, and may leave the weapon unable to fire again before the enemy closes. It also creates a visible warning when the target or allies cross the lane.

The system's failure profile is harsh. Impact can bend the emitter, heat can ruin the charge pack, and forced separation between gun and backpack can reduce the weapon to dead mass. Those weaknesses explain why the PX-5171 remained a prototype support weapon rather than a standard marine rifle.

Application And Uses

In combat, the PX-5171 is best used against large, distracted, armored, or slow-moving targets that justify a long charge. It can punish a creature already engaged by allies, support a defensive line, or deliver a decisive opening shot if the team can prepare the lane before contact.

In exploration or emergency response, the Plasma Gun could burn through heavy obstruction, disable dangerous machinery, or provide high-heat intervention where missiles would cause unacceptable blast damage. Those uses remain risky because the weapon is loud, hot, slow, and dependent on a vulnerable pack.

For field records, investigators should log charge duration, pack condition, laser-sight lane, target movement, impact effect, emitter damage, and whether command authorization was active. Prototype plasma incidents are as much engineering evidence as combat evidence.

At the table, the PX-5171 should create suspense. The operator begins charging, allies protect the lane, the target moves, and everyone knows the shot will matter if it lands. Its identity is not convenience; it is a heavy prototype trying to become a battlefield weapon in real time.

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