From Lexicanum

The Stormsword is an Imperial Guard super-heavy vehicle based on the Shadowsword. It was first seen as a field conversion when the hull of a Shadowsword was salvaged but the original Volcano Cannon was no longer of use. A large siege weapon was used instead, the Hellhammer cannon, or Hellhammer siege gun. It's role has completely changed from the Shadowsword, being used in city and siege warfare and is only ever used at close quarters.

The Hellhammer cannon is sufficiently strong to flatten a building in a single shot and as such it has been enhanced with heavy bolters and heavy flamers to improve its chances in a city where it is unlikely to come across armoured vehicles.^1-p7

Technical Specifications
Vehicle Name:	Stormsword	Main Armament:	Hellhammer cannon
Forge World of Origin:	Unknown, mostly field conversions	Secondary Armament:	2 Heavy Flamers, 2 Heavy Bolters
Known Patterns:	I-XII	Traverse:	2 degrees
Crew:	Commander, Driver, Main Gunner, Remote Gunner, Comms Operator, Loader	Elevation:	From -2 to +12 degrees
Powerplant:	MR507 V18 Multi Fuel	Main Ammunition:	20 rounds
Weight:	302 tonnes	Secondary Ammunition:	2000 rounds
Length:	13.5m	Armour	Armour
Width:	8.4m	Turret:	N/A
Height:	5.85m	Superstructure:	220mm
Ground Clearance:	1.2m	Hull:	210mm
Max Speed - on road	25kph	Gun Mantlet	200mm
Max Speed - off road:	18kph	Vehicle Designation:	0427-658-0215-SW201
Tranport Capacity:	N/A	Firing Ports:	N/A
Access Points:	N/A

^2-p106

Known Stormblades

• Cadian 12th Heavy Tank Regiment, 6th Squadron, fought during 13th Black Crusade^2-p107
• Armageddon 8th Heavy Tank Company, 9th vehicle, unknown unit^2-p108
• Cadian 8th Heavy Tank Regiment, one of six vehicles, possibly refitted from Shadowsword during 13th Black Crusade^2-p109
• Tallarn 17th Heavy Tank Company, attached to Tallarn 101st Armoured Regiment, fifth vehicle of the company, bears eagle's head honour badge after leading the first assault on the Palace of Tears^2-p109
• The Imperial Reaver, a Death Guard Stormsword from the Horus Heresy period^3-p381

Miniatures

Forgeworld released an Arkurion pattern Stormsword in 2008 and they also produce an Epic scale version, which Games Workshop does not supply.

Warhammer 40,000

A standard Stormsword

An Arkurion pattern Stormsword

Epic

A Forgeworld Epic Stormsword

Sources

• ¹:Imperial Armour - Apocalypse
• ²:Imperial Armour Volume I
• ³:Horus Heresy - Collected Visions

Imperial Guard Vehicles
Leman Russ Chassis	Leman Russ Battle Tank • Leman Russ Demolisher • Leman Russ Conqueror • Leman Russ Exterminator • Leman Russ Executioner • Leman Russ Vanquisher • Destroyer Tank Hunter • Thunderer • Bombard • Atlas
Chimera Chassis	Chimera • Hellhound • Basilisk • Griffon • Medusa Siege Tank • Salamander Command • Salamander Scout • Hydra Flak Tank • Manticore • Trojan
Other	Sentinel • Cyclops • Siegfried • Centaur
Super Heavy Tanks	Baneblade • Stormblade • Shadowsword • Stormsword • Stormhammer • Gorgon Armoured Assault Transport