You can use that machine to make whatever weapon you want. Or if you have the material, the iron or whatever you want it made of and give that to me I can transmute something.

[Because Ed's used to that. It's habit to just use alchemy for most everything, as much as it is habit for him to breathe. It's just such a part of him. He doesn't sneak up on her or anything, but he does answer her question, gesturing to the machine to make the weapons.]

I haven't bothered to use it myself when I can make whatever I need with alchemy, but I know others have.