This item is designed to go with The Titan Metroplex.
Bonus Part: DKR001
The add on kit can transform into 2 mode:
1. Gun Mode for Masterpiece Rumble/Frenzy
2. Chest Armor for Rumble/Frenzy
-- Connection parts for Rumble/Frenzy/Ravage/Laserbeak. You can create your own Cassette Combiner!
Please Note: This aftermarket accessory piece is not produced or associated with Hasbro or Takara and is not a Transformers brand toy. These custom pieces are intended to further enhance the enjoyment of your existing Transformer collection.