This is my first theory and post on reddit, and I'm gonna try to make this short.

Has anyone noticed how similar the bullet on the Unveil Fracture video is to Astra's arm? My theory is that the gold plating is used to contain and stabilize radianite, and that when it's removed it turns a bright white color (As seen in the video) and is unstable and dangerous. Let me know if I'm wrong! I'd like to hear other theory's haha!