Republic Fleet Bastion Module

Faction Siege Modules

Republic Fleet Bastion Module — Faction Siege Module (Module) — EVE Online item

An electronic interface designed to augment and enhance a marauder's siege abilities. Through a series of electromagnetic polarity field shifts, the bastion module diverts energy from the ship's propulsion and warp systems to lend additional power to its defensive and offensive capabilities.

This results in a greatly increased rate of defensive self-sustenance and a boost to the ship's overall damage resistances. It also extends the reach of all the vessel's weapon systems and their rate of fire, allowing it to engage targets at farther ranges.

As a side effect of the ionic field created by the bastion module, beneficial remote repair and capacitor transfer effects are ineffective against the fitted ship while the module is active.

In addition, the lack of power to mobility subsystems means that neither standard propulsion nor warp travel are available to the ship, nor is it allowed to dock or jump until out of bastion mode.

Note: Only one bastion module can be fitted to a marauder-class ship. The increased shield boosting and armor repairing gained from the bastion module is subject to a stacking penalty when used with other modules that affect the same attribute on the ship.

Rapid Heavy Missile Launchers are not affected by bastion modules.
Jita Price2.17bISK
90d Avg1.70bISK
Volume200m³
Base Price5.00mISK
Regional market

All Regions price history

Daily traded price, corrected when EVERef republishes historical data.

2.39b 1.81b 1.23b 654m 76.2m Oct 10, 2026 — 8 units traded Oct 11, 2026 — 1 units traded Oct 12, 2026 — 3 units traded Oct 13, 2026 — 5 units traded Oct 14, 2026 — 2 units traded Oct 15, 2026 — 3 units traded Oct 16, 2026 — 4 units traded Oct 17, 2026 — 6 units traded Oct 18, 2026 — 7 units traded Oct 19, 2026 — 6 units traded Oct 20, 2026 — 3 units traded Oct 21, 2026 — 2 units traded Oct 22, 2026 — 4 units traded Oct 23, 2026 — 2 units traded Oct 24, 2026 — 4 units traded Oct 25, 2026 — 6 units traded Oct 26, 2026 — 3 units traded Oct 27, 2026 — 1 units traded Oct 28, 2026 — 30 units traded Oct 29, 2026 — 5 units traded Oct 30, 2026 — 5 units traded Oct 31, 2026 — 5 units traded Nov 1, 2026 — 6 units traded Nov 2, 2026 — 7 units traded Nov 3, 2026 — 7 units traded Nov 4, 2026 — 2 units traded Nov 5, 2026 — 6 units traded Nov 6, 2026 — 3 units traded Nov 7, 2026 — 3 units traded Oct 10, 2026Nov 7, 2026
Average priceUnits traded
Order security
Snapshot Nov 8, 2026, 4:30 PM

Sellers (17)

Location
12,000,000,000Amamake - 5 times nearly AT winners (0.4)157d 8h
12,110,000,000Hek VIII - Moon 12 - Boundless Creation Factory (0.8)157d 5h
12,210,000,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)16d 22h
12,220,000,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)189d 3h
12,235,000,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)189d 2h
12,270,000,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)188d 21h
12,275,000,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)188d 21h
12,291,000,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)188d 3h
12,306,000,000Rens VI - Moon 8 - Brutor Tribe Treasury (0.9)189d 9h
12,308,000,000Rens VI - Moon 8 - Brutor Tribe Treasury (0.9)189d 1h
12,319,000,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)187d 0h
22,320,000,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)185d 20h
12,399,000,000Rens VI - Moon 8 - Brutor Tribe Treasury (0.9)166d 14h
12,406,000,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)185d 1h
12,688,000,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)125d 11h
12,688,000,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)125d 11h
12,850,000,000Amarr VIII - Emperor Family Academy (0.9)189d 16h

Buyers (37)

Location
11,874,000,000Perimeter - 0.0% Neutral States Market HQ (0.9)189d 22h
11,872,000,000Perimeter - 0.0% Neutral States Market HQ (0.9)16d 21h
11,871,000,000Perimeter - 0.0% Neutral States Market HQ (0.9)113d 21h
11,859,000,000Perimeter - 0.0% Neutral States Market HQ (0.9)189d 18h
11,851,000,000Perimeter - 0.0% Neutral States Market HQ (0.9)189d 15h
11,850,000,000Perimeter - 0.0% Neutral States Market HQ (0.9)189d 9h
11,840,000,000Perimeter - 0.0% Neutral States Market HQ (0.9)189d 9h
11,830,000,000Perimeter - 0.0% Neutral States Market HQ (0.9)189d 9h
11,800,000,000Hek - IChooseYou Market and Industry (0.8)188d 7h
11,774,000,000Perimeter - 0.0% Neutral States Market HQ (0.9)181d 9h
11,714,000,000Perimeter - 0.0% Neutral States Market HQ (0.9)179d 22h
11,712,000,000Perimeter - 0.0% Neutral States Market HQ (0.9)179d 17h
11,700,000,000Ashab - Amarr Mk2 CHEAPEST Market (0.9)188d 7h
21,620,000,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)178d 2h
11,607,000,000Perimeter - 0.0% Neutral States Market HQ (0.9)177d 5h
11,601,000,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)174d 11h
51,492,000,000Perimeter - 0.0% Neutral States Market HQ (0.9)167d 8h
11,305,000,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)159d 17h
11,271,000,000Perimeter - 0.0% Neutral States Market HQ (0.9)147d 1h
11,050,000,000Dodixie IX - Moon 20 - Federation Navy Assembly Plant (0.9)185d 13h
11,000,000,000Hek - 0% MARKET Fuelled for 12m (0.8)118d 11h
11,000,000,000Botane - Cheapest Market BE SMART (0.9)121d 8h
1923,300,000Amarr VIII - Emperor Family Academy (0.9)162d 10h
1923,200,000Amarr VIII - Emperor Family Academy (0.9)145d 13h
1176,500,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)175d 21h
399,720,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)126d 9h
31,604,000Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)156d 2h
31,565,000Ignoitton - Svarog Production Center (0.4)186d 8h
51,381,000Ardar V - Moon 2 - Republic Fleet Logistic Support (0.4)160d 17h
31,167,000Fihrneh VI - Moon 1 - Royal Amarr Institute School (0.1)175d 4h
100100Faswiba IX - Moon 1 - Inherent Implants Biotech Production (0.4)131d 6h
81.67Aldranette IX - Moon 1 - FedMart Warehouse (0.4)14d 13h
100,0001Duripant VII - AIR Laboratories School (0.9)14d 4h
11Perimeter - 0.0% Neutral States Market HQ (0.9)173d 23h
100,0001Amsen VI - AIR Laboratories School (0.9)177d 3h
11Perimeter - 0.0% Neutral States Market HQ (0.9)186d 17h
100,0000.01Jita IV - Moon 4 - Caldari Navy Assembly Plant (0.9)150d 0h