X1, or X-1, was a designation applied to the following:

• X1, a Force-sensitive clone trooper.
• The TIE Advanced x1, an Imperial starfighter model.
• X-1, a poison.
• X-1, an Imperial assassin.
• The X-1 Viper, known as the Automadon, an Imperial battle droid model.
• Modified X1 carbine a Wookiee weapon.
• Ranger X-1, an X-1 series droid.

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