In "The Last Mabelcorn," a prototype of the Quantum Destabilizer can be seen sitting on Ford's desk in his room near the beginning of the episode.
In "Weirdmageddon Part 1," Ford takes the weapon up into the church's clock tower on Main Street, near where Bill Cipher and his Henchmaniacs are. As Ford prepares to fire at Bill, a weirdness wave washes over the tower, causing the bell behind Ford to come to life and yell, distracting Ford, who misses and only hits Bill's hat.
It resembles a large gun. It has a long gray body and a bright blue bulb at the end which emerges when the weapon is activated. It also has a scope which is used to aim. The reticle is shaped like a triangle.
- Gravity Falls: Journal 3 reveals that Ford got the weapon's power source from an alternate universe where Stan never pushed him into the Interdimensional Portal. That universe's version of McGucket gave Ford a mysterious element which Parallel McGucket discovered from the Paradox Dimension which is called NowUSeeItNowUDon'tTium.It is also stated in Journal 3 that it is the only power source stable enough to power the device.