The Kai comes with the massive armament and backpack and like the other two Deltas transforms into its Wave Rider mode thanks to included parts from bandai.
Bandai even included little stands for the Fin Funnels!  Also packed into this larger than average HG box are the Long Mega Buster rifle, two Beam Sabers, and plenty of marking stickers.

*Instructions may or may not include English translation*

Assembly required