Some US company specialize in selling CNC mills specifically for firearms.
Ex: https://realghostguns.com/product/gg3-s-cnc-deposit/
It is sold with the cut codes for the AR-15, AR-.308, 1911, Polymer80 and AK-47 receivers and frames.
New York’s budget bill S.9005 buries similar requirements in Part C, sweeping in CNC mills and anything capable of “subtractive manufacturing.”
Yes but most designs still require metal bits. Typically the frame will be 3d printed and then you rely on machined components for things like slides and rails.
Some US company specialize in selling CNC mills specifically for firearms.
Ex: https://realghostguns.com/product/gg3-s-cnc-deposit/