Today, TakaraTomy revealed the source of the brown Bone Blade (mistakenly referred to earlier as the Horn Blade) we saw. It comes from the brand new Gravity Cannon Unit and the Dash Breaker Unit. These weapon sets include a series of brand new weapons in a bronze color, and a complete rerelease of the earlier weapon sets in black instead of silver.

 The Gravity Cannon Unit is scheduled to release on March 28th for 1,100 yen and comes with the equipment listed below. It contains "new weapons" (previously released at WHF in silver, but not in a wide public release) and "rerelease" weapons, which are from the Buster Radar Unit. The Buster Radar Unit originally came in silver, so these weapons sport a new black coloring.

 New Weapons:
  Attachment Frame x2
  Long Assault Rifle x2
  Panzer Faust x2
  Power Rifle x2
  Square Shield x2
  Wing Cutter x2

 Weapon Rerelease:
  A-Z Impact Cannon x2
  A-Z 2-Barrel Cannon x2
  A-Z 3-Shot Charge Missile x2
  Extensive Radome x1
  Flexible Arm x2