Buntline

Buntline is from Xenogears. It is a relatively small, grey humanoid mech. It can be found in the Convergence Universe due to the converging realities of the GASRPGCU.
In Cypher System terms, Buntline is an Artifact:

• Level: 3
• Form: A relatively small, seemingly basic mech.
• Effect: It functions like a small mech (this could be re-powered after depletion). Activate to transform Buntline into a gun that can be fired by another mech. When this functionality is used, the pilot of Buntline also pilots the bullet from within - they choose a damage value to inflict on the target, then must make a Might Task of that difficulty to resist the same damage themselves.
• Depletion: 1 in 1d10