Forging
As everyone watched curiously, Sam carefully forged the Umbryxium.
After heating the pieces sufficiently, he started hammering them out in the shape of the components that he has designed. The shape and basic measures like length and width are all the same. However, the thickness of these components that he beat out of the Umbryxium didn't match the design he drew.
Which made everyone even more curious.
Another peculiar thing they observed is that, after a component is shaped out and had just enough heat that its malleability is very close to its cold usual state, Sam placed his hand over it and used his metal element along with his manipulation ability.
Nobody knew what exactly he was doing like that.
Since the metal itself is very malleable and easy to beat into shape, he managed to finish the components very quickly. He laid all of them on the table in their positions. Now, he needs to work on each weapon separately.