Building your own firearm can be an exciting and fulfilling experience, especially when using an 80 percent lower receiver. This partially completed lower allows enthusiasts to create custom firearms while adhering to specific legal requirements. However, before making a purchase, there are several important factors to consider. This guide outlines what you need to know before buying an 80 percent lower.
Understanding the 80 Percent Lower Concept
An 80 percent lower receiver is a firearm component that is not fully finished, meaning it has been designed in such a way that it lacks the necessary machining to be classified as a firearm under federal law. This allows hobbyists to purchase it without a background check, as long as they complete the remaining work needed to make it functional.
The Legal Landscape
Before purchasing an 80 percent lower glock 19 barrel, it’s essential to understand the legal implications. While federal laws govern the sale of firearms, state laws can differ significantly. Check local regulations to ensure compliance with laws regarding ownership, construction, and any marking requirements for your completed firearm.
Recognizing State-Specific Regulations
In addition to federal guidelines, many states have enacted legislation specifically targeting 80 percent lowers and ghost guns.
Key Considerations
- Registration Requirements: Some states require registration or serialization of homemade firearms.
- Restrictions on Sale: Check if your state permits the sale and transfer of homemade firearms or has specific rules regarding the use of 80 percent lowers.
- Variation in Regulations: States like California and New York have stricter regulations than others. Research is crucial to avoid legal pitfalls.
Choosing Quality Materials
The quality of the 80 percent lower is critical for ensuring a reliable and functional firearm.
Material Options
Most 80 percent lowers are made from either aluminum or polymer:
- Aluminum: Generally stronger and more durable, aluminum lowers are the most popular choice. Look for lowers made from high-grade materials like 7075-T6 aluminum, which provides enhanced strength and resistance to wear.
- Polymer: While lighter and often more affordable, polymer lowers may not offer the same long-term durability as aluminum options. Choose high-quality polymers that have a proven track record.
Compatibility and Features
When selecting an 80 percent lower, ensure compatibility with other components of your build.
Key Specifications
- Compatibility with Upper Receivers: Ensure the lower is designed to fit with the upper receiver you intend to use (e.g., AR-15 or AR-10).
- Fire Control Group Incompatibility: Make sure that the lower will accommodate the type of fire control group you plan to install.
- Integrated Features: Some lowers may come with integrated features like trigger guards, flared magwells, or ambidextrous controls. Decide if these extras are worth the price.
Assessing the Machining Process
Completing an 80 percent lower requires you to machine the receiver to install the necessary components properly.
Tools Required
- Drill Press: A drill press allows you to achieve the precision needed for drilling holes in the lower.
- Dremel Tool: Useful for fine-tuning and smoothing out areas after initial machining.
- Files and Sandpaper: Essential for working down any rough edges and ensuring proper fit.
Evaluate your ability to acquire the tools necessary for completing the lower, as this can impact your success.
Understanding Assembly Requirements
Completing an 80 percent lower requires knowledge of the assembly process.
Resources for Learning
- Instructional Guides: Many manufacturers provide detailed guides for completing their lowers. Use these as a reference to ensure you understand each step.
- Online Communities: Engaging in firearms forums or attending courses can offer valuable insights and assistance from seasoned builders.
Being informed about the assembly process can empower you to avoid common pitfalls.
Warranty and Customer Support
Before purchasing, check if the manufacturer offers a warranty or customer support.
Importance of Support
- Quality Assurance: A warranty can provide peace of mind, ensuring that you are covered in case of defects or issues with the lower.
- Customer Service: Good customer service can be invaluable if you encounter problems during assembly or need guidance on product features.
Final Thoughts
Buying an 80 percent lower can be a great starting point for building your own firearm. However, understanding the legal landscape, ensuring compatibility, and knowing what materials to look for are crucial steps in the process.
Equipped with this knowledge, you’ll be better prepared to select a high-quality 80 percent lower that suits your needs and ensures a successful build. From understanding state regulations to assessing quality materials, taking these considerations into account will enhance your building experience and ultimately lead to a reliable and enjoyable firearm.
