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The Scorpius is Millennium's Destroyer-based long stable driver. With a long glidey flight just shy of neutral-stable and a dependable fade, the Scorpius is one of the longest control drivers we've ever tested. Throw it hard enough and it will give a little flip, riding out until a very late forward-penetrating fade.
Zero-G Quantum is Millennium's application of the Innova Blizzard Technology. These Zero-G models have tiny air bubbles in the plastic (sometimes the flight plate, but typically moreso in the rim) that bring the overall weight down. This allows for the same stability as heavy discs while allowing for an easier throw. These are great for advanced players as well as lower-powered throwers.