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A Stalker and Hunter of the White Scars Chapter in battle.

The Stalker, also known as the Whirlwind Stalker, is a specialised, mobile anti-air platform and variant of the Whirlwind Hunter, itself a variant of the Whirlwind Artillery Tank.

The Stalker is an adaptation of the Hunter Standard Template Construct (STC) that was unearthed by the Adeptus Mechanicus only a few standard millennia ago. Mounting a pair of independently tracking Icarus Stormcannons, the Stalker can target multiple enemy contacts, stitching the skies with a hail of armour-piercing death.

The Stalker is a relatively new addition to the armouries of the Adeptus Astartes, having only been put into production relatively recently after its STC data was rediscovered.

The Stalker is a vital part of a Space Marine Chapter's armoury and it is deployed as a rapid-firing anti-aircraft platform that is able to track and engage multiple enemy targets simultaneously.

The Stalker's front and flank armour is thicker than most other Rhino-chassis-based vehicles, allowing the Stalker to deflect or absorb more incoming enemy fire.

The Stalker's sides also feature hydraulic stabilisers that anchor the vehicle to the ground so that when it fires its anti-aircraft artillery it suffers no recoil and loss of accuracy.

Space Marine battle tanks are not permanently attached to any one company. Instead they form a vehicle pool, and individual tanks are available for deployment to Space Marine commanders as required.

Upon its creation, a Space Marine battle tank is assigned a name that reflects its role as a protector of the Chapter's brethren. From that point onwards, the vehicle is as much a part of the Chapter as the Space Marines themselves, and over the years its many deeds and victories will be celebrated as greatly as the Chapter's flesh and blood heroes.


A close up view of one of the Stalker's triple-barrelled Stormcannons, part of its Icarus Stormcannon Array.

The Stalker is an anti-air variant of the standard Astartes Whirlwind Artillery Tank. The Stalker replaces the Whirlwind's Whirlwind Multiple Missile Launcher with an Icarus Stormcannon Array. Unsubtle and devastating, the Icarus Stormcannons are a twinned array of multi-barrelled ballistic cannons that have the capacity to track multiple targets at once.

Each cannon is shackled to separate servo-minds that direct the cannon independently of each other. The weapons can fire upon separate targets, or if needed they can both fire upon the same target.

Each salvo fired from the Stormcannons fills the air with hundreds of rounds of ammunition that are capable of tearing even the greatest winged Tyranid beast or potent enemy flyer from the sky.

The Stalker can also be outfitted with Dozer Blades, Extra Armour Plating, a Hunter-Killer Missile Launcher, improved communications equipment, a Pintle-mounted Storm Bolter, a Searchlight, and Smoke Launchers.

Firing Modes

A Whirlwind Stalker of the Ultramarines Chapter.

The Stalker is capable of unleashing its Stormcannons in two different firing modes depending on the situation, as follows:

  • Single Target Mode - The Stalker concentrates both its Stormcannons at the same target, and the weapons act as if they were twin-linked, firing in tandem. This sheer concentration of fire can bring down even the heaviest of enemy flyers.
  • Dual Target Mode - The Stalker is capable of firing its Stormcannons independently of one another, each firing upon a different target at the same time. This reduces the sheer amount of damage that can be inflicted upon a single target but allows the Stalker to engage multiple targets effectively.

Unit Composition

  • 1-3 Stalker Anti-Air Tanks


A standard Stalkerr is armed and equipped with:

A Stalker may take one of the following pintle-mounted weapons:

Stalkers may also have a variety of vehicle equipment such as:


A Hunter and two Stalkers as part of an Anti-Air Defence Force Formation.

The following is a list of known formations used by the Stalker:

  • Anti-Air Defence Force - The Anti-Air Defence Force provides an Astartes strike force a formidible amount of anti-air protection. This formation is made up of both Hunter and Stalker anti-air tanks. The formation can include any number Hunters but must include at least two Stalker tanks.

Adeptus Mechanicus Technical Specifications

Whirlwind Stalker Anti-Air Tank
Vehicle Name: Whirlwind Stalker Main Armament: Turret-mounted Icarus Stormcannon Array
Forge World of Origin: Unknown Secondary Armament: N/A
Known Patterns: Unknown Traverse: 360 degrees
Crew: 1 Driver, 1 Gunner Elevation: 0 to 55 degrees
Powerplant: Quad MkII Adaptable Thermic Combustor Reactor Main Ammunition: Unknown
Weight: 33 Tonnes (Approx.) Secondary Ammunition: N/A
Length: 6.6 metres (Approx.) Armour:
Width: 4.5 metres (Approx.)
Height: 5.0 metres (Approx.) Superstructure: Unknown
Ground Clearance: 0.44 metres (Approx.) Hull: Unknown
Max Speed On-Road: Unknown Gun Mantlet: N/A
Max Speed Off-Road: Unknown Vehicle Designation: Unknown
Transport Capacity: N/A Firing Ports: N/A
Access Points: N/A Turret: Unknown

Also See


  • Codex Adeptus Astartes - Space Marines (8th Edition), pp. 88-89, 175
  • Codex Adeptus Astartes - Space Marines (7th Edition) (Digital Edition), "Battle Tanks", "Stalkers"
  • Codex: Space Marines (8th Edition) (Revised Codex), pp. 85, 153
  • Codex: Space Marines (6th Edition), pp. 100-101, 121, 176
  • Codex Adeptus Astartes - Dark Angels (8th Edition), pp. 59, 117
  • White Dwarf (September 2013) - Space Marine Stalker
  • Games Workshop - Whirlwind Stalker / Hunter
  • Warhammer 40,000: Munitorum - Stalkers and Hunters (Digital Edition)
  • Warhammer 40,000: Index Astartes - Volume I (Digital Edition)


Space Marine Forces
Chapter Command Chapter MasterMaster of the KeepMaster of SanctityChief LibrarianMaster of the ApothecarionMaster of the ForgeMaster of the WatchMaster of the FleetMaster of the ArsenalMaster of the MarchesMaster of the RitesMaster of RelicsChief VictuallerLord ExecutionerMaster of RecruitsMaster of ReconnaissanceMaster of the SignalChapter AncientPrimaris AncientChapter ChampionHonour Guard
Company Command Command SquadReclusiam Command SquadCaptainPrimaris CaptainLieutenantPrimaris LieutenantCompany AncientCompany Champion
Specialists Librarian (EpistolaryCodicierLexicaniumPrimaris LibrarianVanguard Librarian) • Chaplain (ReclusiarchPrimaris Chaplain) • Apothecary (Primaris ApothecaryHelix Adept) • Techmarine
Veteran Squads Veteran Marines (Sternguard VeteranVanguard Veteran) • Terminator SquadTerminator Assault Squad
Battleline Squads Tactical SquadIntercessor SquadInfiltrator Squad
Close Support Squads Assault SquadInceptor SquadReiver SquadIncursor SquadSuppressor SquadBike SquadCenturion Assault Squad
Fire Support Squads Aggressor SquadDevastator SquadHellblaster SquadEliminator SquadCenturion Devastator Squad
Neophyte Squads Scout SquadScout Bike Squad
Light Vehicles Assault BikeAttack BikeScout BikeLand Speeder (Land Speeder StormLand Speeder TempestLand Speeder TornadoLand Speeder TyphoonLand Speeder VengeanceLand Speeder ProteusDarkshroud)
Combat Walkers Dreadnought (Castraferrum DreadnoughtSiege DreadnoughtHellfire DreadnoughtIronclad DreadnoughtVenerable DreadnoughtMortis DreadnoughtChaplain DreadnoughtLibrarian DreadnoughtFurioso DreadnoughtDeath Company DreadnoughtRedemptor DreadnoughtWulfen DreadnoughtDoomglaive Dreadnought) • Nemesis DreadknightInvictor Tactical Warsuit
Armoured Personnel Carriers RhinoRazorbackDamocles Command RhinoRhino PrimarisRhino AdvancerImpulsor
Main Battle Tanks Predator Destructor (Predator AnnihilatorBaal Predator) • Land Raider (Land Raider PhobosLand Raider CrusaderLand Raider RedeemerLand Raider AchillesLand Raider PrometheusLand Raider Terminus UltraLand Raider AresLand Raider ExcelsiorLand Raider Wrath of MjalnarLand Raider Angel InfernusLand Raider Solemnus AggressorLand Raider Anvilarum) • Deimos Vindicator Laser DestroyerRepulsorRepulsor ExecutionerAstraeus
Artillery WhirlwindVindicatorStalkerHunterWhirlwind HyperiosLand Raider HeliosThunderfire Cannon
Aircraft StormtalonThunderhawkThunderhawk TransporterShadowhawkStormravenStorm EagleFire RaptorStormhawk InterceptorCaestus Assault RamDark TalonNephilim JetfighterStormfangStormwolfCorvus BlackstarOverlordDrop Pod
Rare or Retired Vehicles Contemptor Pattern DreadnoughtDeredeo Pattern DreadnoughtCerberus Heavy Tank DestroyerLeviathan DreadnoughtJavelin Attack SpeederJetbikeDeimos PredatorDeimos RhinoSabre Tank HunterLand Raider ProteusMark IIb Land Raider PhobosSicaran Battle TankSicaran VenatorSicaran Punisher Assault TankSicaran Arcus Strike TankSicaran Omega Tank DestroyerSpartan Assault TankTyphon Heavy Siege TankFellbladeFalchionMastodonDeimos Whirlwind ScorpiusXiphon Pattern InterceptorStormbirdKharybdis Assault Claw