HOME > ATF Rules > ATF Rule 2021R-05F - 80% Lowers

The letter below from the ATF / DOJ dated 9/27/22 shows what is considered a firearm and what is not with regards to 80% lowers.
Individual state laws still apply.

It is the customers responsibility to know all applicable laws that apply to them. Please complete your research BEFORE making
a purchase. Contact your local FFL or the ATF directly with any questions. MAS Defense LLC is not responsible
for any city,
county, state or federal laws that you (the purchaser) do not comply with.