This item cost 4,950 yen and is set for a July 16th release. In addition, you can buy both the Ryuko Nogeki and the Tiguardra as part of a single set for 10,230 yen.
To use each Avataro Gear, set it to the DX Donblaster (sold separately) and turn the large gear to move the muzzle. The standby sound unique to each Avataro Gear plays, and pulling the trigger will activate something to said Sixth Hero. This set cost 1,320 yen and is set for a June 4th release.
[via Tokunation]