Leia in Boushh diguise is coming to the bust line-up! It will have removable arms, one with a blaster and one with a thermal detonator. It is also rumored to have a remoeable helmet!
It isn't a blaster. It's the staff that Boussh holds. It's a great piece, no doubt. I got to see it over the weekend in Chicago, and it's very nice. However, it's also a prototype. That's why photography wasn't allowed.
The helmet doesn't actually go over the Leia head. Rather, there's a pin that holds in up. The left hand has interchangeable fingers so that it can either cradle the helmet or brandish the thermal detonator.