Particle

MVP Disc Sports says this about the Particle:

The sleek 10mm putter class gets a tasty upgrade with the new Neutron Particle. The Particle debuted as a mystery mold used for the majority of Electron Experimental discs, and then as a Neutron Player’s Pack disc in 2017 MVP Circuit events. Particle is best described as flying like a more overstable Envy, able to handle wind and a long straight travel before a guaranteed fade. As with all MVP and Axiom 10mm class discs, the Particle has a mildly shallow height that makes it fast in the air and easy to throw cleanly without wobble.