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How Gun Builders Use an 80 Percent Lower Jig

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In the world of firearms and weapon creation, Gun Builders often use a unique tool known as an 80 percent lower jig. This resource is both highly functional and serves a vital role in the construction process. This article aims to explain the definition of an 80 percent lower jig, its purpose and functionality, why it is crucial for gun builders, and how they employ it in their process.

Defining an 80 Percent Lower Jig

An 80 percent lower jig is a tool used predominantly in firearm assembly. This specialized piece of equipment assists in the completion of an 80 percent lower receiver, which accounts for the final 20 percent of a firearm that remains incomplete. Legally, this unfinished part of the gun isn’t considered a firearm until its construction is finalized. Consequently, these components can be freely purchased and sold, sidestepping certain federal firearm regulations. This legal nuance paves the way for Gun Builders to craft their own firearms from the ground up.

Purpose and Functionality of an 80 Percent Lower Jig

The primary role of an 80 percent lower jig is to guide the builder through the final stages of making an 80 percent lower receiver into a fully operational firearm. The jig is typically constructed of two interlocking halves that snugly fit around the 80 percent lower. The design of the jig incorporates predetermined whole patterns and areas to be milled, clearly indicating the exact spots the builder needs to drill or remove material. This detailed guide provides a template for the builder to follow, ensuring the completion of the receiver accurately and safely.

Why Gun Builders Use an 80 Percent Lower Jig

The use of an 80 percent lower jig offers several appealing advantages to Gun Builders. Primarily, it gives them the autonomy to craft their own firearm at their convenience without needing to go through the formal federal registration procedure. This tool also enables builders to personalize their firearm to align with their unique specifications, providing an enhanced sense of self-reliance. Additionally, using an 80 percent lower jig often results in significant cost savings, as constructing a firearm independently can be substantially less expensive compared to purchasing a pre-assembled one from the market.

The Process of Using an 80 Percent Lower Jig

The initial step in the utilization of an 80 percent lower jig is securing the unfinished lower receiver into the jig. This is followed by employing the included drill bits and end mill bits to excavate and remove the indicated material from the receiver, as outlined by the guides on the jig. The task is considered completed when the requisite material has been successfully removed from the receiver, transforming it into a fully operational firearm component. Each step needs to be carried out with precision and care to ensure the accurate assembly and safe use of the finished firearm.

Common Materials Used in 80 Percent Lower Jigs

The construction of an 80 percent lower jig usually entails the use of robust and durable materials like high-quality aluminum. The inherent resilience of aluminum makes it well-suited to withstand the drilling and milling stresses, offering a precise and clean finish to the firearm. Alternatively, some builders might opt for polymer 80 percent lower jigs. Though not as durable as their aluminum counterparts, polymer jigs can be a more economical choice. Plus, they tend to be more user-friendly, particularly for those who are relatively new to the firearm construction process. Regardless of the material chosen, the quality of the jig plays a crucial role in the successful completion of an 80 percent lower receiver.

Things to Keep in Mind When Using an 80 Percent Lower Jig

As with any tool, safety is paramount when utilizing an 80 percent lower jig. It’s advised to don protective eyewear and gloves during the milling and drilling stages to prevent accidents. Precision is crucial during the process; errors can lead to an unusable or hazardous firearm. It’s also vital to regularly inspect the jig for wear and tear to ensure accurate results. While constructing your own firearm may circumvent certain regulations, remaining cognizant of all applicable local and state laws pertaining to firearm possession and manufacturing is vital. In essence, safety, precision, maintenance, and legal awareness are crucial considerations when using an 80 percent lower jig.

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