The Graviton Pulse is a weapon based upon increasing the local gravity of of the targeted until the targeted is either unable to fuction or is crushed by its own gravity field.
The strength of the pulse orginates from an artficial singularity inside the Uranians Ships Reactor. By redirecting the the gravity field of the singularity onto a target the target's own gravity begins too increase.
The more often result of the graviton pulse is when the target either surrenders or is disabled. However, like in the case of a of some insane taiidan soldier the soldier refused to surrender, eventually causing the ship to crush into itself until the 500ft long ship was on 3 inches wide.