Targeter A model using a weapon with a targeter gains a+1 modifier on its roll to hit with that weapon. Targeters are always fitted to specific weapons, so a Space Marine armed with a bolt pistol and a missile launcher with a targeter would get+1 to hit when he was shooting with the missile launcher but not with the bolt pistol. Targeters may not be interchanged between weapons during a battle. Weapons which are linked to fire in unison, such as the dual lascannon on a land raider,may use a single targeter.
