Cities of Sigmar Β· battle formation

Ironweld Gunline: the artillery and blackpowder firebase formation (AoS 4th Ed)

A shooting-focused formation that maximises cannons and massed blackpowder from a static firebase.

Age of Sigmar 4th editionRules checked July 13, 2026

SprueSentry strategy commentary for Age of Sigmar 4th edition, not official rules. Games Workshop updates points and rules regularly β€” always confirm against the current official rules and your latest dataslate before a game.

The Ironweld archetype rewards leaning into Cities' famous firepower β€” great cannons and ranked blackpowder infantry. This is original AoS 4th-edition commentary, not official rules; the formation's exact name (e.g. an Ironweld/artillery formation) and its numeric bonus differ between the 2024 Faction Pack and the current Battletome, so verify the live wording.

What the formation does

It boosts your ranged output β€” commonly by extending range or improving the reliability of your guns β€” so a static firebase can threaten more of the table and grind down priority targets. The trade-off is that blackpowder weapons tend to perform best when stationary, so this formation wants you anchored rather than chasing objectives. Confirm the specific bonus against the current battletome/faction pack.

Who it suits

Players who enjoy a deliberate, board-controlling firebase and who will invest in artillery and Fusiliers. It suits defensive missions and metas where you need to reliably delete key enemy monsters or elites at range.

Key units

  • Ironweld Great Cannon β€” long-range anti-elite/anti-monster artillery; the centrepiece.
  • Freeguild Fusiliers β€” massed blackpowder infantry, best static and Under Orders for accuracy.
  • Cogfort β€” a durable heavy platform that adds firepower and presence.
  • Freeguild Steelhelms β€” screens and objective-holders to protect the guns.

When to pick it

Pick it when your collection is artillery/shooting heavy and the mission lets you hold a firing line. Think twice against fast alpha-strike armies that can reach your guns on turn one, or on missions that force you to keep moving onto scattered objectives.

Common questions

Do I need to keep the guns still?

Usually, yes β€” blackpowder shooting typically rewards staying put, and this formation doubles down on a firebase. Plan deployment so your guns have lanes without needing to reposition. Verify the current rules text.

What's the biggest weakness of a gunline formation?

Getting charged early. Fast monsters, deep-strikers and flyers can shut down a firebase, so budget for screens and a counter-charge unit.

Rules sources

Written by SprueSentry with SprueSentry editorial (hand-authored, research-grounded), grounded in the cited sources β€” original commentary, not Games Workshop rules text.