Ghommal's hilts are rewards from the Combat Achievements system obtained by speaking to Ghommal (or Laidee Gnonock after the completion of While Guthix Sleeps) at the Warriors' Guild entrance. If new tasks are introduced after a player has already obtained a certain upgrade for the hilt, even if they then have no longer completed enough points from tasks for the corresponding tier, they can keep that version of the hilt, but it will only provide the benefits of the highest tier the player has achieved, and it will also not be possible to obtain more of them until they have completed the newly introduced tasks.
The different upgrades of Ghommal's hilt are:
Ghommal's hilt 1, from 41 Combat Achievements points
Ghommal's hilt 2, from 169 Combat Achievements points
Ghommal's hilt 3, from 436 Combat Achievements points
Ghommal's hilt 4, from 1100 Combat Achievements points
Ghommal's hilt 5, from 1965 Combat Achievements points
Ghommal's avernic defender 5, combining hilt 5 and the Avernic defender
Ghommal's hilt 6, from 2697 Combat Achievements points
Ghommal's avernic defender 6, combining hilt 6 and the Avernic defender