The grav-gun is a devastating weapon based on ancient and forgotten technology. Manipulating the very nature of gravity itself, the gun turns a target’s mass against it, crushing it to pulp under its own weight. This is especially shocking when used against heavily armoured infantry like Terminators, the hapless warrior brutally crushed by the bulk of their ceramite plates until only a crimson trickle remains of what they once were. Space Marine Chapters are among the few warriors of the Imperium to be gifted with the use of grav-guns, and it is a sacred honour for such a potent weapon.