The rarity of Stormcharge Dragoon is Mythical, and been equipped it takes a “Bundle” slot. At this moment the item is available for trade.
Stormcharge Dragoon is a skin for Disruptor. The skin was added to the game on January 12, 2017, it was created by Sith Happens.
Stormcharge Dragoon has been recently added to the game, which makes it rather popular with the game community.