Probably a minor developer oversight, but it still bugs me (no pun intended):

EVERY out of the 27 'breaker' items uses beast scales except the Firebreak Helm which uses scrap metal.

I'm aware that the 2* and 3* armors and helmets have different recipes, due to the differnt 2* status themed materials, but there is no sense for this lone recipe to be using a different material.

(Also, the 3-5* shard boms use blast powder, while the 2* needs owlite feathers to be crafted. Just for consistency, it'd be better to change that.)