The ATF has changed their minds yet again on what constitutes a firearm when it comes to striker fired pistols frames. They sent out an open letter today stating the following.
https://www.atf.gov/news/pr/atf-iss...cation-“frame-or-receiver”-final-rule-certain
So while it was still legal to buy just a frame (without a jig or tools) without having to go through a FFL yesterday, now even just an unfinished frame by itself must now go through a FFL and also have a serial number on it.
This definition of “readily” applies to each classification of a partially complete frame or receiver under this rule, whether sold alone or as part of a kit; therefore, even without any associated templates, jigs, molds, equipment, tools, instructions, guides, or marketing materials, these partially complete pistol frames are “frames” and “firearms” as defined in the GCA and its implementing regulations.
https://www.atf.gov/news/pr/atf-iss...cation-“frame-or-receiver”-final-rule-certain
So while it was still legal to buy just a frame (without a jig or tools) without having to go through a FFL yesterday, now even just an unfinished frame by itself must now go through a FFL and also have a serial number on it.