Everything You Need to Know About 80% Lowers

Everything You Need to Know About 80% Lowers

If you’re delving into the world of custom firearms, you’ve likely encountered the term “80% lowers.” At 80-lower.com, we pride ourselves on providing high-quality 80% lowers that cater to both novice and experienced builders. But what exactly are 80% lowers, and why have they become so popular? In this blog, we’ll explore the intricacies of 80% lowers, their benefits, legal considerations, and why 80-lower.com is your best source for these crucial components.

What Are 80% Lowers?

80% lowers are partially completed firearm lower receivers that require additional machining before they can be used in a fully functional firearm. The term “80% lower” refers to the fact that the receiver is roughly 80% finished, leaving the remaining 20% to be completed by the purchaser. This allows firearm enthusiasts the opportunity to customize their build and complete the final steps themselves.

At 80-lower.com, we offer a wide range of 80% lowers crafted from high-quality materials to ensure durability and performance. Our products are designed to be user-friendly, making the machining process accessible even to those new to firearm building.

Benefits of 80% Lowers


One of the primary attractions of 80% lowers is the level of customization they offer. By starting with an 80% lower, builders can choose every component, from the type of metal to the final finish. This level of customization is a major draw for firearm enthusiasts who want a truly personalized firearm.


Purchasing an 80% lower can be more cost-effective than buying a complete firearm. At 80-lower.com, we offer competitive pricing on all our 80% lowers, allowing you to build your firearm at a fraction of the cost of purchasing one off the shelf. Additionally, building your own firearm can save on the taxes and fees associated with buying a fully assembled firearm.

Learning Experience

Building a firearm from an 80% lower is a valuable learning experience. It allows you to understand the inner workings of your firearm, from the trigger mechanism to the safety features. At 80-lower.com, we provide detailed guides and resources to help you through the machining process, ensuring that you gain a comprehensive understanding of your build.

Legal Considerations

It’s important to understand the legal aspects of purchasing and completing an 80% lower. In the United States, 80% lowers are not considered firearms by the Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) until they are completed. This means that they can be purchased without a background check and shipped directly to your home. However, it’s crucial to comply with all local, state, and federal laws regarding firearm assembly and ownership.

At 80-lower.com, we advise all our customers to thoroughly research their local laws before purchasing an 80% lower. While the federal regulations are clear, state and local laws can vary significantly. Being informed and compliant ensures that your building process is legal and trouble-free.

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Why Choose 80-lower.com?

When it comes to purchasing 80% lowers, 80-lower.com stands out as a trusted and reliable source. Here are some reasons why our customers choose us:


Quality is our top priority at 80-lower.com. We use only the best materials and manufacturing processes to produce our 80% lowers. Our products undergo rigorous testing to ensure they meet the highest standards of durability and performance.

Customer Support

We understand that building a firearm can be a daunting task, especially for first-timers. That’s why we offer exceptional customer support to guide you through the process. Our team of experts is available to answer any questions you may have and provide assistance when needed.


80-lower.com provides a wealth of resources to help you complete your 80% lower. From detailed instructional guides to video tutorials, we ensure that you have all the information you need to successfully complete your build. Our website is designed to be user-friendly, making it easy to find the information and products you need.


We offer a wide variety of 80% lowers to suit different preferences and needs. Whether you’re looking for an AR-15 lower, an AR-10 lower, or a pistol lower, 80-lower.com has you covered. Our extensive selection ensures that you can find the perfect 80% lower for your project.

The Machining Process

Completing an 80% lower requires some machining, but with the right tools and guidance, it can be a straightforward process. Here is a basic overview of the steps involved:

  1. Gather Tools and Materials: Before you start, you’ll need a few tools, including a drill press or milling machine, jigs, and various bits. 80-lower.com offers kits that include everything you need to get started.
  2. Secure the 80% Lower: Using a jig, secure the 80% lower to ensure stability during the machining process.
  3. Drill the Holes: Follow the instructions to drill the necessary holes for the trigger and safety mechanisms. Precision is key here, so take your time.
  4. Mill the Fire Control Pocket: Use a milling machine to remove the excess material from the fire control pocket. This is the most critical part of the process, so ensure your measurements are accurate.
  5. Finish and Assemble: Once the machining is complete, clean and finish your 80% lower as desired. Then, you can assemble the remaining components to complete your firearm.


80% lowers offer an exciting and rewarding way to build a custom firearm. At 80-lower.com, we are dedicated to providing top-quality 80% lowers and the resources you need to complete your build successfully. Whether you’re a seasoned builder or just starting out, our products and support will help you create a firearm that meets your exact specifications.

Embrace the world of custom firearm building with 80% lowers from 80-lower.com, and enjoy the satisfaction of crafting a firearm that is uniquely yours. Visit our website today to explore our selection and start your next project with confidence.


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