Unlocking the Potential of an 80% Lower: A Comprehensive Guide

Welcome to, your ultimate destination for all things related to the 80% lower. In this blog, we’ll delve into the fascinating world of 80% lowers, explaining what they are, their benefits, and how you can get started on your own custom firearm build. Whether you’re a seasoned gunsmith or a hobbyist looking to embark on a new project, understanding the 80% lower is essential. So, let’s dive in and explore the potential of the 80% lower together.

What is an 80% Lower?

An 80% lower is a firearm component that is partially completed. As the name suggests, it is 80% finished, leaving the remaining 20% to be completed by the buyer. This allows enthusiasts to custom-build firearms without the need for a Federal Firearms License (FFL), provided they do not intend to sell the completed firearm. The 80% lower serves as the foundation for building various types of firearms, including AR-15s, AR-10s, and pistols.

At, we offer a wide range of 80% lowers, ensuring that our customers have access to high-quality, reliable components for their builds. Our products are designed to meet strict standards, providing a solid starting point for your custom firearm project.

Why Choose an 80% Lower?

There are several compelling reasons to choose an 80% lower for your next firearm build:

  1. Customization: An 80% lower allows for extensive customization. You can choose the components, finishes, and features that suit your preferences, resulting in a truly unique firearm.
  2. Privacy: Purchasing an 80% lower does not require a background check or registration, offering a higher level of privacy compared to buying a fully completed firearm.
  3. Education and Skill-Building: Building a firearm from an 80% lower is an educational experience. It enhances your understanding of firearm mechanics and hones your gunsmithing skills.
  4. Cost-Effectiveness: Completing an 80% lower can be more cost-effective than purchasing a pre-built firearm. You have the freedom to choose parts that fit your budget without compromising quality.

At, we believe in empowering our customers to create their ideal firearms. Our selection of 80% lowers is designed to provide a robust foundation for your build, ensuring both quality and performance.

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Getting Started with Your 80% Lower Build

Starting a build with an 80% lower is an exciting journey. Here’s a step-by-step guide to help you get started:

Step 1: Choose Your 80% Lower

The first step is selecting the right 80% lower for your project. At, we offer a variety of materials and styles to suit different needs. Whether you prefer aluminum for its lightweight durability or polymer for ease of machining, we have options to match your requirements.

Step 2: Gather Your Tools and Parts

To complete your 80% lower, you’ll need some essential tools and additional parts. Common tools include a drill press, a jig, and a set of drill bits. Additionally, you’ll need parts like the lower parts kit, upper receiver, barrel, and stock. Ensure you have everything you need before beginning your build.

Step 3: Complete the Machining

Using a jig, you’ll drill and mill the remaining 20% of the 80% lower. This step requires precision and attention to detail. Take your time and follow the instructions provided with your jig carefully. At, we also offer resources and guides to assist you throughout this process.

Step 4: Assemble Your Firearm

Once the machining is complete, you can assemble the remaining parts to complete your firearm. This includes installing the lower parts kit, attaching the upper receiver, and adding the barrel and stock. Follow the assembly instructions specific to your firearm type.

Step 5: Test and Enjoy

After assembly, it’s crucial to test your firearm to ensure it functions correctly. Conduct a safety check and take it to a range for testing. Enjoy the satisfaction of having built a custom firearm with your own hands.

Legal Considerations

While building a firearm from an 80% lower is legal in many areas, it’s essential to be aware of the laws and regulations in your location. At, we encourage all our customers to comply with local, state, and federal laws. Remember, selling a firearm built from an 80% lower typically requires an FFL.

Tips for a Successful Build

Building a firearm from an 80% lower can be a rewarding experience. Here are some tips to ensure your build is successful:

  1. Research Thoroughly: Before starting your build, research extensively. Understand the type of firearm you want to build and gather information on the necessary parts and tools.
  2. Invest in Quality Tools: Quality tools make a significant difference in the ease and precision of your build. At, we recommend investing in a high-quality jig and drill press for the best results.
  3. Take Your Time: Patience is key. Rushing through the machining and assembly process can lead to mistakes. Take your time to ensure each step is completed accurately.
  4. Seek Guidance: Don’t hesitate to seek guidance from experienced builders or online communities. There are numerous resources available to help you navigate the process.


Building a custom firearm from an 80% lower is a fulfilling and educational endeavor. At, we are dedicated to providing top-notch 80% lowers and resources to support your build. With the right tools, knowledge, and dedication, you can create a firearm that reflects your personal style and preferences.

Explore our range of 80% lowers today and embark on your next project with confidence. Whether you’re a seasoned builder or a newcomer, is here to help you every step of the way. Unlock the potential of the 80% lower and enjoy the journey of crafting your custom firearm

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