The idea of building your own firearm using a lower 80% is becoming more popular with gun enthusiasts. It is a unique combination of customization, education and security. However, the process may be complicated and requires complete understanding of both the legal and mechanical aspects. This article will walk you through the fundamentals for 80% lowers starting with the understanding of what they mean to the process of building your gun.
How much is an lower?
A lower of 80% is a firearm receiver that is not finished which is not yet deemed an actual weapon by The Bureau of Alcohol, Tobacco, Firearms, and Explosives. It does not have the machining required to operate as an actual firearm. It’s usually not having the hammer and trigger pinholes and the pockets for the fire control group and safety switch for selecting. The phrase “80 lower” indicates it is eighty percent completed, which requires the builder to complete the remaining 20 percent.
Different types of 80% lowers
Lowers that are 80% are generally available for a range of firearm platforms, such as:
- AR-15 is the most well-known platform, renowned for its flexibility and the an extensive aftermarket service.
- AR-10 A bigger platform to use .308 caliber cartridges and similar cartridges.
- 1911 handguns for those who are interested in building a traditional semi-automatic pistol.
- Glock-style Pistols: For polymer-framed handgun enthusiasts.
Materials Options
The 80% lowers are made of various materials, each having their own benefits:
- Aluminum: Lightweight, robust and fairly easy to work with.
- Polymer: Lightweight, and easier to work with than aluminum, but not as strong.
- Steel: Extremely durable, but extremely difficult to work with and weighs a lot.
Legal Questions
Before you embark on a build with a build that is 80% smaller it’s important to be aware of what legal implications.
Federal Law
In federal law, an percent lower is not a firearm. This means that it doesn’t require an identification number, background screening, and FFL (Federal Firearms License) to purchase. But once the lower is complete and is able to function as a firearm, it has to comply with all federal laws.
State Law
State laws may differ greatly. Certain states have regulations on lowers of 80 and the requirement for serialization, or even outright bans. For instance, California mandates that all self-made firearms be registered and serialized. Make sure you check the local and state laws before making any construction.
Benefits of Building Your Own Firearm
Customization
The creation of your own firearm lets you to select every component that you want, from the trigger and barrel to the sights and stock. This degree of customization lets you customize the gun to suit your individual desires and needs.
and Skill Development and Skill Development
The process of finishing the 80% reduction can be enjoyable and educational. It gives you hands-on experience in firearm mechanics, and increases your knowledge of how firearms operate.
Privacy
For those who are concerned about the privacy of their firearm, making it with a lower 80% provides a level of privacy that is not offered with conventional purchase of firearms, since the purchase itself does not need a background check or registration.
Tools and Equipment Required
To complete a lower of 80% requires special instruments and tools. This is a list of general requirements:
- Drill Press and Milling Machines: for precise milling and drilling.
- Jig Kit: to hold the upper receiver place, and to help guide the machining process.
- Drill Bits and End Mills The sizes that are needed to fit the different pockets and holes.
- Vise to ensure that the receiver is secured during machining.
- Safety Equipment Ear protection and eye protection and gloves.
- Calipers: To measure precisely.
- Tool for Deburring: to smooth the edges and surfaces after cutting.
Step-by-Step Procedure to Finish an Eighty percent Lower
1. Preparation
Begin by gathering all of the required tools and ensure you have an organized, well-lit work area. Go through the directions included in your jig kit to get familiar with the procedure.
2. Secure the lower part of the Jig
The lower part of the 80% in the jig, and then secure it following the instructions of the manufacturer. The jig provides the required guides and supports to ensure precision in drilling and milling.
3. In the drilling process, you drill Pilot Holes
Utilizing the correct drill bits, you can drill the pilot holes according to the directions provided by the Jig. These holes are normally used for an hammer or trigger pin and the safety selector switch. Be patient and make sure every hole is dug to the proper size and depth.
4. Grinding into the Fire Control Group Pocket
After the pilot holes have been done, make use of an ending mill cut out the pocket of the fire control group. This requires patience and precision. Be sure to mill at the right depth and follow the guidelines of the jig carefully.
5. Final Touches
After milling, make use of deburring tools to remove any burrs or rough edges. This ensures that all parts work properly and fit. Check all measurements, and make any adjustments needed.
6. Assembly
Once the machining is complete then you are able to put the lower receiver together along with the other firearm components. Follow the standard assembly procedure to fit your particular firearm model.
Safety Beware of
Safety is essential when working with lowers that are 80% full and firearms generally. Always wear the proper safety equipment and follow. The correct procedures to prevent accidents. Make sure your work area is well-ventilated and free of any distractions. If you’re unsure of certain steps. seek help from a professional or experienced builder. gunsmiths.
Common Faults to Avoid
Incorrect Measurements
Precision is crucial when you are making an around 80% lower. Small deviations could result in a malfunctioning firearm or safety concern. Double-check the measurements and use calipers to check precision.
Over-scheduling the Process
It is important to be patient. The process of machining that is rushed can result in errors and poor quality work. Be patient and take your time. Follow every step with care.
Employing the wrong tools
Utilizing substandard or improper tools can affect the quality of your work. Choose high-quality tools, and make sure they’re suitable for the material used in the lower receiver.
Troubleshooting Common Problems
Holes that are not aligned
A misaligned hole can create problems during assembly. If you experience this issue make sure you check your jig’s alignment and ensure that your milling or drilling machine is calibrated correctly.
Edges and Burrs Edges and Burrs
The rough edges and burrs could hinder the operation of your gun. Utilize deburring tools as well as sandpaper to smooth any imperfections.
Incorrect Milling Depth
A wrong milling depth could affect the functioning in the control of fire. Check all depth measurements and settings prior as well during milling.
Post-Completion Requirements
When your lower 80% is completed and assemble, run thorough checks to make sure that all components function properly. Examine your safety switch, the trigger and the group of bolts to confirm that they function as intended. If it is required by law in your state you must serialize and register your new firearm.
Conclusion
The process of building your own firearm using a lower of 80% can be an educational and enjoyable experience that gives you a great degree of customisation and privacy. When you know the basics of lowers that are 80% and following the legal requirements and following a specific step-by-step procedure, you can be successful in creating a functional and safe firearm. Make sure you are focusing on safety and accuracy during the entire process.
