Since (at least in the Glock's case) the polymer frame is the federally defined and controlled 'weapon' and everything else (barrel/slide/trigger-assy/etc) simp

Since (at least in the Glock's case) the polymer frame is the federally defined and controlled 'weapon' and everything else (barrel/slide/trigger-assy/etc) simple accessories that anyone can own, it would seem we're already there. I presume Glock shape files are already out in the wild. https://www.youtube.com/watch?v=C4dBuPJ9p7A https://www.youtube.com/watch?v=C4dBuPJ9p7A