This is a rather old item. It's a modified version of the Battle B-Daman Gobalt Blaster. It has a barrel attached, and the arm has a green part to hold it in place with your finger when firing. Therefore, the arm is not an original part. This is a custom item. I don't know the names of the other four B-Damans. They are missing parts and use parts from other machines, so please consider these four as extras. The stickers are peeling, and there is dust from years of storage. I will remove as much as possible, but please understand that it is being sold as is. I am looking forward to purchases from those who understand that this is a used and old item.