The Stormsword was originally a field workshop conversion of the Shadowsword. When a Shadowsword or Stormblade is knocked out, the salvaged chassis is rebuilt and new weapons are added to create the Stormsword, as troops have christened it. This is common practice with other vehicles, such as the Thunderer and many unique variants of other Imperial Guard vehicles. Whilst such conversions are 'unofficial' and frowned upon by the conservative upper echelons of the Adeptus Mechanicus, Imperial Guard commanders facing the enemy on the ground must take a more pragmatic view. Any vehicle that can fulfil a battlefield role can and will be utilised.