80 Percent Lower
An 80 percent lower receiver is an unfinished firearm component, typically made from aluminum or polymer, designed to be the foundation of a semi-automatic rifle like the AR-15. The "80 percent" refers to the fact that it's roughly 80% complete—machined with most of the necessary features but lacking key elements like the trigger pin holes, selector switch hole, and other critical cuts that make it a functional firearm. These parts are often sold as "blanks" or "jigs" for hobbyists who want to complete the build themselves. The process involves using tools like drills, mills, or CNC machines to finish the receiver. Once completed, it can be paired with an upper receiver, barrel, and other parts to create a working rifle.
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5d Tactical
5D Tactical specializes in manufacturing unfinished firearm receivers, jigs, and accessories primarily for AR-15 style rifles. The name “5D” refers to the five dimensions of precision machining: X, Y, Z, and two rotational axes, emphasizing their commitment to accuracy. Based in the United States, the company focuses on providing affordable, high-quality blanks that allow users to complete their own firearms legally and safely.
Their products are designed for those who enjoy the craftsmanship of building rifles, offering a balance of affordability and durability. 5D Tactical has grown rapidly, thanks to positive reviews from users who praise the ease of use and reliability of their jigs.
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80 Lower
80 Lower is a U.S.-based company, dedicated to manufacturing unfinished firearm receivers and precision jigs. Their name directly reflects their core product: 80% lower receivers for platforms like AR-15, AR-9, and AK-47 rifles. These are blank aluminum or polymer parts that require machining to become functional firearms, allowing users to build custom rifles legally and affordably.
The brand emphasizes precision engineering, using advanced CNC technology to produce reliable blanks. 80 Lower has gained a reputation for user-friendly designs that make the completion process accessible, even for beginners.
Glock Frame
A Glock frame, also known as the lower receiver or grip module, is the main structural component of a Glock pistol. It houses the trigger mechanism, magazine well, and provides the grip for the user. Unlike traditional pistols, Glock frames are polymer-based, making them lightweight, durable, and corrosion-resistant.
For DIY enthusiasts, “80% Glock frames” are unfinished versions that require machining to complete. These blanks allow builders to create custom pistols without starting from scratch, offering flexibility for modifications like adding rails or customizing grips.
Ar10 Lower
An AR-10 lower receiver is the lower half of the rifle’s receiver, housing the trigger group, magazine well, and stock attachment. It’s the foundation that, when paired with an upper receiver, creates a fully functional AR-10 rifle. Unlike the more common AR-15 (5.56mm), the AR-10 is designed for larger cartridges like .308, offering greater range and power.
For builders, “80% AR-10 lowers” are unfinished blanks requiring machining to complete. These allow for legal, custom assembly without a full firearm purchase upfront.
P80 Frame
P80 Frame is an 80% lower receiver made from reinforced polymer, designed to mimic the Glock pistol’s iconic ergonomics. It’s unfinished, meaning it requires drilling and assembly to become a functional firearm. Polymer80‘s innovation lies in using polymer instead of metal, reducing weight and cost while maintaining strength.
Compatible with Glock models like the G17, G19, and G26, the P80 Frame supports calibers such as 9mm, .40 S&W, and .45 ACP. Its modular design lets builders add features like extended magazines or custom grips.
80 Percent Lower Jig
An 80 percent lower jig is a precision tool designed to guide drilling, milling, and cutting operations on 80% lower receivers unfinished firearm components that require machining to become functional. These jigs ensure accurate placement of holes for pins, triggers, and selectors, minimizing errors and enhancing safety. Typically made from aluminum or steel, jigs clamp onto the receiver and feature bushings or templates for guided drilling. They're compatible with standard tools like drill presses or mills, making them accessible for home workshops.
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