Receiver Blanks

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Answers to some common questions specific to receivers known as 80% receivers or unfinished receivers.

When does a receiver need to have markings and/or serial numbers?

What is an “80%” or “unfinished" receiver?

Have firearms made from unmarked receiver blanks been recovered after being used in a crime?

Is ATF aware of the receiver blanks, commonly referred to as 80% receivers?

Can functioning firearms made from receiver blanks be traced?

Are “80%” or “unfinished” receivers illegal?

Are there restrictions on who can purchase receiver blanks?

Are some items being marketed as non-firearm "unfinished" or "80%" receivers actually considered firearms?