At Dirty Bird Guns and Ammo, we stay ahead of Sacramento’s regulations so our customers can build without running into trouble. Unfinished receivers, commonly called 80 percent lowers, are now fully regulated under three key bills: AB 879 (2019), AB 1057 (2021), and AB 1621 (2022). Every provision is active, with the final electronic approval … Continue reading AB 1621, AB 879 & AB 1057 Explained: California’s Precursor Part Rules