| Album | Wild Arms the 4th Detonator Original Score |
| Composer | Masato Kouda[1] |
| Disc | 2 |
| Track | 4 |
| Length | 3:16 |
| Instrumentation | Snare drum, cymbal, bassoon, tuba, oboe, xylophone, violin, viola, tambourine |
| Previous Track | REASON Which Opens the Moment |
| Next Track | The Shining Spear Pierces the Darkness |
Weapon X is a song used in Wild Arms 4 when the player party is on Aerial Fortress Eulalia.