Void shields

The 40k equivalent to shields. As in energy shields (the ones that take FUCKTONS of damage and never break) Void Shields displace missiles and projectiles by placing them into another dimension, which is why missiles go *Poof* when they touch them. The Imperium, being the Imperium, has also found a way to weaponise the damn things. Get a ship with void shields close enough to another ship, or a space station, or a planet or what have you and then turn those suckers on. Bam. Suddenly, your enemy's missing half of his shit and you didn't even have to fire a single gun.