Mass-displacement gun

The mass-displacement gun is a device from the 2005 IDW portion of the Generation 1 continuity family.

Well, I suppose we could test it on something not living first, but where's the fun in that?

The highly-experimental mass-displacement gun was created by Brainstorm, and can temporarily shrink a Cybertronian. It can be stored in a handy miniaturized form.

Fiction

2005 IDW continuity

When apparently long-dead Nanocons inside of Ultra Magnus were suddenly revived, Brainstorm used his mass-displacement gun to shrink Rodimus, Skids, Whirl and First Aid so they could go inside Magnus and eliminate all of the invaders. Brainstorm took it with him down to the surface of Theophany stowed in its miniaturized form. When they encountered Metrotitan, a Titan who lacked the power reserves to teleport himself away from the planet, the gun was used to reduce his mass and therefore reduce the power requirements. You, Me, and Other Revelations