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What Is an 80 Percent Lower and How Does It Work?
Understanding the Concept of an 80 Percent Lower An 80 percent lower is an unfinished firearm receiver that is only partially machined and requires additional work before it can be used in a fully functional firearm. It gets its name from being approximately 80% complete, leaving the remaining 20% for the buyer to finish. These components are especially popular among firearm enthusiasts who enjoy customizing or building their firearms from scratch. The appeal of an 80 lower receiver lies in its classification. Since it is not fully machined, it is not considered a firearm by federal law, meaning it can be purchased without the need for a Federal Firearms License (FFL) or a background check. However, completing an 80 lower receiver transforms it into a functional firearm, which then must comply with all applicable federal and state laws. Materials Used in 80 Percent Lowers 80 percent lowers are typically made from: Aluminum : Offers a lightweight yet durable solution, ideal for...
