Transformers Siege WFC-S51 Astrotrain - Leader Character_Clogstopper Features a transforming trailer that

Features a transforming trailer that allows for one-step transformers to interact with it and give Optimus Wings

So it turns out that Caliburst is a redeco of a previous Battlemaster Decepticon

meaning it is a combiner

A brand new mold

Transformers Siege WFC-S51 Astrotrain - Leader Character_Clogstopper Features a transforming trailer thatA brand new mold, a brand new look. The first leader class Decepticon Astrotain is all abord the party train, and even space shuttle! Comes with two cannons and faithfully represents his Generation 1 Transformers look, even the gray! What's not to love about old Spacebus? Come mint in sealed box!