The Comprehensive Guide to 80% Lowers by

At, we pride ourselves on offering the highest quality 80% lowers in the market. For firearm enthusiasts, builders, and hobbyists, 80% lowers provide an unparalleled opportunity to customize and complete a lower receiver with personal touches, all while adhering to federal regulations. In this comprehensive guide, we will delve into everything you need to know about 80% lowers, ensuring that you have all the information necessary to make an informed decision and successfully complete your project.

What is an 80% Lower?

An 80% lower is an incomplete lower receiver for a firearm, typically an AR-15 or AR-10, that requires additional machining to become a functional part. At, our 80% lowers are designed to be compliant with federal law, which allows you to finish the lower yourself without needing a serial number, background check, or a firearm dealer license. This unique aspect of 80% lowers makes them an attractive option for gun enthusiasts looking to build their firearms from the ground up.

Benefits of 80% Lowers


One of the primary benefits of using 80% lowers is the ability to customize your firearm. With an 80% lower from, you can personalize your lower receiver to suit your specific needs and preferences. Whether you want to engrave your initials, add custom paint, or modify the structure, 80% lowers give you the freedom to create a truly unique firearm.


Privacy is another significant advantage. Purchasing a completed lower receiver requires going through a licensed firearm dealer, which includes background checks and paperwork. With 80% lowers, you can avoid this process, allowing you to maintain your privacy while still building a fully functional firearm.


Building your firearm with an 80% lower can also be more cost-effective than purchasing a pre-assembled lower receiver. At, we offer a range of 80% lowers at competitive prices, enabling you to save money while enjoying the satisfaction of building your own firearm.

Legal Considerations

It’s crucial to understand the legal landscape surrounding 80% lowers. According to federal law, an 80% lower is not classified as a firearm, meaning it does not require a serial number, background check, or FFL (Federal Firearms License) to purchase. However, state laws vary, and some states have stricter regulations regarding the purchase and completion of 80% lowers. Before purchasing from, ensure that you are familiar with your state’s laws to remain compliant.

The Machining Process

Completing an 80% lower involves machining certain areas to transform it into a functional lower receiver. This process requires specific tools and a degree of skill. At, we recommend the following steps to complete your 80% lower:

  1. Gather Tools and Materials: You will need a drill press or milling machine, drill bits, and a jig to hold the lower in place during machining.
  2. Secure the Lower: Use the jig to secure the 80% lower in the correct position.
  3. Drill the Holes: Carefully drill the required holes for the trigger, hammer, and safety selector.
  4. Mill the Fire Control Pocket: Use the milling machine to mill out the fire control pocket to the correct depth and dimensions.
  5. Test Fit Components: Once the machining is complete, test fit all components to ensure proper alignment and functionality.

Completing an 80% lower can be a rewarding experience, allowing you to learn more about the mechanics of firearms and develop valuable skills.

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Quality Assurance at

At, quality is our top priority. Our 80% lowers are crafted from high-grade materials, ensuring durability and reliability. Each lower is rigorously inspected to meet our stringent standards, providing you with a product you can trust. Whether you are a seasoned builder or a first-time hobbyist, you can rely on for exceptional 80% lowers.

Our Product Range

We offer a diverse range of 80% lowers to suit various needs and preferences. Our selection includes:

  • AR-15 80% Lowers: Our AR-15 80% lowers are made from high-quality aluminum, offering strength and precision.
  • AR-10 80% Lowers: For those looking to build a larger caliber rifle, our AR-10 80% lowers provide the perfect foundation.
  • Anodized and Raw Options: Choose between anodized 80% lowers for added durability or raw lowers for a customizable finish.

Each product in our range is designed with the builder in mind, offering ease of use and superior performance.

Tips for Success

To ensure a successful build, consider the following tips:

  • Take Your Time: Rushing the machining process can lead to mistakes. Take your time to ensure precision.
  • Use Quality Tools: Investing in high-quality tools can make the machining process smoother and more accurate.
  • Follow Instructions: Carefully follow the instructions provided with your jig and tools to avoid errors.
  • Seek Help if Needed: If you’re unsure about any step, don’t hesitate to seek advice from experienced builders or online forums.


Building your firearm with an 80% lower from is a fulfilling and rewarding experience. With the ability to customize, maintain privacy, and save money, 80% lowers offer numerous advantages for firearm enthusiasts. By understanding the legal considerations and following the proper machining steps, you can successfully complete your 80% lower and enjoy a personalized, high-quality firearm. Explore our range of 80% lowers today and start your building journey with

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