TEXT: w w w. g a m e s - wo r k s h o p . c o m
  The Imperium has long relied on sophisticated laser
  technology to engage the truly monstrous opponents that
  assail it from all sides. Though the lascannon may be potent
  enough in the field and well suited to the destruction of
  enemy armour, when a planet is beleaguered by alien
  behemoths or hostile attack craft only one weapon in the
  Imperium’s arsenal is truly up to the task.
  The Defence Laser is a monstrous engine of destruction so
  large that it can usually only be mounted upon static
  platforms. The largest Defence Lasers use vast reservoirs of
  energy, blacking out power grids for miles around each
  time they fire. The blinding red blasts unleashed by a
  Defence Laser are so powerful that they can breach the
  atmosphere of a planet and engage targets in low orbit,
  making the weapon invaluable for repelling alien invasions.
  Even a glancing blow from a Defence Laser can be enough
  to drive off anything up to a cruiser-class ship once its
  shields are down.
  DEFENCE LASER
  POINTS: 350
  Defence Laser.
  Observatorium
  Crenellated
  Defence Nests.
  UNIT: 1 Defence Laser.
  The Defence Laser must
  have a pompous sound-
  ing name.
  TYPE: Static Super-heavy.
  STRUCTURE POINTS: 3
  WEAPONS AND EQUIPMENT: 
  - Defence Laser
  OPTIONS:
  - Can be upgraded to have 2 twin-linked autocannon with
  anti-aircraft mounts at +50 points (use normal BS4)
  - Can be upgraded to have up to 8 twin-linked heavy bolters 
  at +10 points each.
  WEAPON
  RANGE
  STR
  AP
  SPECIAL
  Defence Laser
  60"- Unlimited
  D
  1
  Ordnance 10” Blast,
  Primary Weapon,
  Pinning
  SPECIAL RULES
  Immobile: The Defence Laser is Immobile – it may not move
  at all. The Defence Laser counts any Driver Stunned result as
  a Gun Crew Stunned result instead.
  Orbital Cannon: Defence lasers are able to lock onto
  targets in low orbit, driving them off or, with a direct hit,
  reducing them to thousands of pieces of flaming debris. A
  Defence Laser can forgo its usual shooting in order to
  neutralise an opponent’s off-table support.
  Declare the Orbital Cannon option is being used when the
  enemy attempts to use one of the following strategic assets
  and roll to hit using the Defence Laser’s usual BS.
  Orbital Bombardment
  Scheduled Bombardment
  Precision Strike
  Blind Barrage 
  If a hit is scored the strategic asset is neutralised for the rest
  of the game. If the Defence Laser misses, the stragetic asset
  may be used as normal. 
  ARMOUR
  BS
  FRONT
  SIDE
  REAR
  4
  13
  13
  13
  Generatoris
  Clusters.
  Flak turrets
  (20,000
  autocannon
  rounds per
  installation).
  Duty’s Fist, the Defence Laser that
  towers over the west gate of
  Bellephon, was a miracle of dark
  age technology. The Fist could
  reroute the power of the entire
  metropolis into one almighty laser
  blast. When fired in this manner
  Duty’s Fist had the capacity to
  smash a Titan into a thousand
  pieces, and even engage targets in
  orbit above the planet. During the
  battle for Bellephon upon Thesus
  Reach, Duty’s Fist exchanged fire
  with the Planet Killer, Abaddon the
  Despoiler’s personal flagship.
  Though it forced the Planet Killer
  into evasive manouvres it was
  eventually disabled by a mighty
  Greater Daemon of Tzeentch, and
  its defenders were torn apart by a
  one-man assault by Khârn the
  Betrayer, champion of Khorne.
  Defence Lasers with over 20
  confirmed enemy craft kills:
  Hammer of the Cursed
  Spear of the Emperor’s Fury
  Eternal Vigilance
  Inescapable Wrath
  Pious Retribution (called
  Gunhead by its crew)
  
SOURCE: textdata/thevault/Warhammer/40k/1st-8th Editions (Prior)/5th Edition (2008)/Apocalypse Datasheets/40k 5e - Imperial Guard - Defence Laser.pdf