Armament / GF-4091 Breach Mine
- Name
- GF-4091 Breach Mine
- Classification
- Federation carried barrier-demolition mine / back-pack explosive charge
- Procurement Code
- GF-4091: Garrison/Fleet explosive, 4th generation, 09-frame, revision 1
- Manufacturer / Origin
- Galactic Federation combat engineering and demolition logistics
- Primary Role
- Destroying heavy barriers, opening objective routes, and clearing fortified access points under escort
- Firepower Rating
- High structural demolition / controlled blast
- Primary Effect
- Focused explosive breach against reinforced doors, walls, barricades, and route-blocking obstacles
- Known Users
- Demolition Troopers assigned to Pirate Homeworld path-clearing operations
- Safety Note
- Requires escort, placement discipline, stand-off clearance, and command authorization before detonation
- Feature Summary
- Back-carried Federation demolition explosive, internally associated with the name GF_Mine, used by Demolition Troopers to destroy barriers too strong for ordinary infantry fire.
- Technical Profile
- The GF-4091 is a carried breach mine rather than a thrown grenade: it is delivered by a specialist, placed against the target, armed under pressure, and detonated to make a route where none exists.

System Overview
The GF-4091 Breach Mine is the archive designation for the large explosive carried by Federation Demolition Troopers. Development notes identify the carried explosive internally as GF_Mine, and field behavior shows it being used to clear barriers rather than as ordinary anti-personnel ordnance.
The charge exists because some objectives cannot be reached through fire superiority alone. On Pirate Homeworld, Demolition Troopers were required to clear the path toward a major objective after orbital and defense-system conditions changed. The mine therefore belongs to combat engineering doctrine: move the charge, place it, protect the operator, and open the route.
The procurement code reads Garrison/Fleet explosive, 4th generation, 09-frame, revision 1. That places the device in a controlled ordnance family designed for fleet-supported ground operations rather than hunter-class improvisation.
Technology And Function
The mine likely uses a shaped blast lens, magnetic or mechanical anchoring points, armored charge casing, encrypted arming bus, and a command detonator tied to Federation IFF procedure. Its job is to concentrate force into a barrier instead of wasting energy in open air.
Back-carriage explains both the trooper's vulnerability and the mission drama. The explosive must be large enough to defeat strong barriers, but that mass reduces agility and makes the carrier dependent on escorts. A demolition detail succeeds only if enough charge carriers survive to the breach site.
The internal GF_Mine name is useful for archive language because it implies an engine or asset identifier rather than a public model label. GF-4091 gives the site an in-universe procurement name while preserving the source clue.
Application And Uses
In deployment, the GF-4091 is used against sealed doors, hardened barricades, shielded access points, and objective barriers that must be removed quickly under hostile pressure. It is a path-opening weapon, not a normal combat attack.
Field investigators should log charge residue, stand-off distance, carrier casualties, barrier material, command signal evidence, and whether enough demolition personnel survived to complete a multi-charge breach. Those details can explain why a mission succeeded or collapsed.
At the table, the mine should make escort scenes matter. The question is not just whether the party has explosive power, but whether they can keep the charge carriers alive long enough to place it.