In the world of firearms, the terms “80 lower” and “80 percent lower” are often used interchangeably, but they can lead to confusion among enthusiasts and new builders alike. Understanding the nuances of these terms is essential for anyone considering a DIY firearm project. This article will clarify the differences between an 80 lower and an 80 percent lower, helping you navigate this important aspect of firearm assembly.
Contents
What is an 80 Lower?
The term “80 lower” typically refers to an unfinished lower receiver that has not been fully machined or completed. This component is essential in the construction of firearms, particularly in AR-style rifles. An 80 lower is not classified as a firearm under federal law, as it lacks the features necessary for such classification. The absence of critical machining—such as the trigger and hammer pin holes—means that the 80 lower requires additional work before it can function as a firearm.
What is an 80 Percent Lower?
The phrase “80 percent lower” is essentially synonymous with “80 lower.” However, it emphasizes the fact that the lower receiver is 80 percent complete, meaning it requires about 20 percent more work to be operational. This term highlights the unfinished state of the receiver and the requirement for additional machining. When you hear “80 percent lower,” it serves as a reminder that the builder must complete the necessary modifications to make the component functional.
Key Differences Explained
Terminology
The primary difference between “80 lower” and “80 percent lower” lies in terminology. While both terms refer to the same type of unfinished receiver, “80 percent lower” explicitly indicates the extent of completion. Some users may prefer one term over the other, but both refer to the same concept in firearm assembly.
Legal Implications
From a legal perspective, both terms indicate that the receiver is not classified as a firearm, allowing for easier purchase and transfer. However, builders must remember that regardless of the term used, they are responsible for completing the lower receiver in compliance with local laws and regulations. It’s essential to research your state’s laws regarding 80 lowers and ensure that you follow all legal requirements during the building process.
Context of Use
In practice, the term “80 lower” is often used more casually among builders and enthusiasts, while “80 percent lower” may be used in more formal contexts, such as instructional materials or legal discussions. Understanding the context in which each term is used can help clarify discussions about unfinished receivers.
Building Considerations
Regardless of the terminology, building from an 80 lower or an 80 percent lower involves similar processes:
- Machining: Both require the same basic machining tasks, including drilling holes and milling out the fire control pocket.
- Tools and Jigs: The same tools and jigs can be used for both types, facilitating the completion of the lower receiver.
- Legal Compliance: Builders must adhere to local laws, regardless of which term they use, as both types are subject to the same regulations.
Advantages of Using an 80 Lower
Building from an 80 lower or an 80 percent lower offers several advantages:
- Customization: Builders can create a firearm tailored to their specific preferences, selecting parts and finishes that suit their style.
- Cost-Effectiveness: Often, building from an 80 lower can be more affordable than purchasing a complete firearm, especially for those who enjoy the assembly process.
- Skill Development: The assembly process allows builders to gain hands-on experience and a deeper understanding of firearm mechanics.
Conclusion
Understanding the differences between “80 lower” and “80 percent lower” is essential for anyone interested in building their own firearm. While the terms are largely interchangeable, recognizing the nuances can enhance your knowledge and communication within the firearms community. Regardless of which term you prefer, both refer to the same unfinished component that requires additional work to become a functional firearm. By familiarizing yourself with the building process and legal considerations, you can confidently embark on your DIY firearm project.