80 Percent Lower | 80% Lowers | VERY FAST SHIPPING

Description

Product Overview

An 80 percent lower receiver is the foundational component for a custom rifle build, representing the critical starting point for enthusiasts who value personalization and technical engagement. This specific product is an 80% lower, crafted from billet aluminum, offering a robust and lightweight platform. Intended for the experienced hobbyist, machinist, or builder, it serves as a partially completed firearm part that requires final machining to become a functional firearm receiver. As per federal regulations (ATF guidelines), it is not classified as a firearm at this stage and can be sold directly to end-users without an FFL transfer. Its primary use is to serve as the core for building a custom AR-pattern rifle, such as an AR-15, allowing for complete control over the final specification and performance of the firearm.

Key Features

• Precision-Machined Billet Aluminum: Constructed from a solid block of 7075-T6 aluminum, this lower receiver offers exceptional strength-to-weight ratio and durability, ensuring a long-lasting foundation for your build.
• 80% Completion State: Delivered in a state that requires final machining of the fire control group pocket and other minor areas, making it compliant for direct purchase while providing a satisfying project for the capable builder.
• Universal AR-15 Compatibility: Designed to mil-spec dimensions, ensuring compatibility with the vast majority of AR-15 parts kits, uppers, stocks, and grips available on the market.
• Anodized Raw Finish: The raw, unfinished aluminum surface is ready for your personal touch, allowing for custom milling, engraving, or the application of a durable type II or type III hardcoat anodized finish after machining.
• Reinforced Stress Points: Key areas, such as the buffer tube threads and takedown pin lugs, are designed with enhanced material for increased resilience under repeated use.
• Jig-Ready Design: The blank is engineered to work seamlessly with common 80% lower jig systems, facilitating accurate and efficient completion with the proper tools and expertise.

Performance & Applications

The utility of an 80 percent lower lies in its application as a customizable platform. For the competitive shooter, it provides a route to a truly bespoke rifle. By completing the machining themselves or through a trusted gunsmith, they can achieve a perfect fit for a high-end trigger group, potentially improving accuracy and control tailored to a specific discipline like 3-Gun or precision rifle matches.

For the hobbyist machinist and firearms enthusiast, the project itself is the primary application. The process of meticulously finishing the receiver using a jig, drill press, or CNC machine represents a deep dive into the mechanics of the AR-15 platform. This results in a profound understanding of the rifle’s function and a strong personal connection to the finished firearm, which is often used for recreational shooting, training, and as a centerpiece of a technical collection.

Additionally, it serves as a solution for creating a legacy or commemorative firearm. Builders can incorporate custom serialization, engravings, or unique finishes that are not available on commercial, serialized receivers, making the final rifle a one-of-a-kind heirloom.

About the Build Process

It is essential to understand that an 80% lower is a project component, not a finished product. Success requires access to appropriate tooling—typically a dedicated jig, a drill press or milling machine, and specific end mills—along with advanced mechanical aptitude. The builder assumes full responsibility for the quality, safety, and legality of the finished firearm. All applicable local, state, and federal laws must be researched and followed, including regulations on manufacturing firearms for personal use (per ATF guidelines 27 CFR § 478.11 & 479.11) and any state-specific restrictions. This is not a project for beginners without mentorship or proper research.

Why Buy From F1 Firearms

F1 Firearms, based in Spring, TX, has established a reputation in the industry for precision manufacturing and innovative design, as seen in their flagship F1 Firearms FDR-15 platform. Sourcing an 80 percent lower from a manufacturer with this level of expertise in billet aluminum machining ensures you are starting with a component that meets high standards of dimensional accuracy and material integrity. Their direct experience in producing complete, high-performance firearms informs the design of even their component parts, providing builders with a foundation worthy of a premium build.

Make Your Decision

Choosing this 80 percent lower is the first step in a dedicated build process. It is suited for you if you possess the technical skills, tools, and commitment to see a complex project through to completion while adhering to all legal requirements. Evaluate your capabilities, research the necessary steps for safe and legal completion, and ensure this aligns with your goals for a fully customized rifle. This product offers no shortcuts, but for the right individual, it offers the ultimate in personalization and mechanical satisfaction.

Technical Specifications

Frequently Asked Questions