AR15 80% Lower Receiver

An 80% lower is an unfinished receiver. You finish the machining yourself with a jig and a drill or router.

• A fun project if you like working with tools
• The 2022 ATF frame or receiver rule still treats many kits as firearms, so most buyers need a background check
• An August 2026 court ruling exempts some buyers, and ATF is drafting a revised rule, so check the latest before you buy
• Several states ban or restrict them
• Never sell or give away one you made unless your laws allow it

Check federal and state rules before you buy. See AR15 Laws.

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