Xometry does not carry a Federal Firearms License (FFL) an therefore cannot produce any product that requires a FFL. As a general rule this encompasses receivers and any serialized component of a weapon.
We can build accessories like grips, hand guards, holsters, and other peripheral items. Xometry has the right to refuse work if it we feel it may violate or be in a "gray area" with FFL regulations. If a part is auto-quoted an purchased that may be in question an Xometry representative will reach out to the customer.
3D printed components also follow standard manufacturing regulations. For more information on 3D Printing Technology and Firearms please go to: https://www.atf.gov/qa-category/3-d-printing-technology-firearms