Is the Arsenal Firearms Dueller pistol a "machine gun"?

[Bolt_Action]

The way it was explained to me-

They offer two versions.

One with linked trigger (pull one trigger, both hammers drop), and one with independent triggers.

The one with independent triggers has linked hammers- either they both fall or they both sit.
Pull one trigger, nothing happens. Pull the other one (while holding down the first), both hammers drop simultaneously.

-Dave

I'm assuming that it must be the second design, because I don't see how the first wouldn't be prohibited as a machinegun by ATF. But this also seems to imply that if you had a firearm with a hundred triggers, and you had to pull them all but only upon pulling the last one would the firearm automatically discharge 100 times, that would not be a machinegun?

Or alternatively, if you had some sort of camming system that stored trigger pulls, you could pull one trigger X times, and then pull a second trigger which would cause the firearm to discharge X shots in rapid sequence, that would *not* be a machinegun because technically only one round was fired for each pull of a trigger?