80 Percent Lower Receiver – Billet Aluminum AR-15 / AR-10 / AR-9 Build Kit (P80-002)

Description

For the dedicated builder who demands more than an off-the-shelf part, our 80 percent lower receiver represents the purest form of firearms ownership. This isn’t just a component; it’s the blank canvas for your next precision build, where your skill determines the final outcome. Craft your legacy from the ground up.

Product Overview

This 80% lower receiver is a partially completed firearm component, supplied in an unfinished state as defined by the ATF. Manufactured from a single block of 7075-T6 billet aluminum, it arrives requiring the end user to perform the final machining operations to create a functional lower receiver. This process is designed for experienced hobbyists and machinists who possess the necessary tools, including a drill press or milling machine, and technical knowledge. It is the critical first step in building a fully custom rifle or pistol on the AR platform.

Key Features

• Precision machined from high-strength 7075-T6 aircraft-grade billet aluminum for exceptional durability.
• Universal compatibility with AR-15, AR-10 (LR308/SR25), and AR-9 (9mm) parts kits and uppers.
• Supplied in an unfinished 80% state, allowing for personalization and final machining by the end user.
• Features reinforced stress points and a clean, machined exterior ready for your finishing work.
• Includes all necessary fire control group pin holes pre-drilled to proper jig specifications for alignment.
• Designed for use with standard P80-style jigs (jig sold separately) to guide the completion process.

Technical Specifications

SKU: P80-002
Material: 7075-T6 Billet Aluminum
Finish: Unfinished Raw Machined
Platform: Multi-Caliber (AR-15 / AR-10 / AR-9)
Fire Control: Semi-Auto Compatible
Status: 80% Lower Receiver (Not a firearm)

Compatibility

This versatile lower receiver is engineered to function with a wide range of AR platform builds. It is directly compatible with standard AR-15 mil-spec parts kits and upper receivers. For larger caliber builds, it accepts DPMS-pattern AR-10 / LR308 parts kits and upper assemblies. It is also configured for popular 9mm AR-9 blowback systems using Colt-style or Glock-style magazine blocks (adapter may be required). Always confirm parts compatibility before beginning your build.

Legal & Compliance Notice

This 80 percent lower receiver is sold as a piece of unfinished metal or a firearm component, NOT as a firearm. It is the purchaser’s responsibility to understand and comply with all federal, state, and local laws regarding the purchase, completion, and possession of such items. By purchasing, you certify you are 18 years of age or older (21+ in some jurisdictions) and that completion of this receiver into a functional firearm is legal in your jurisdiction. It is intended for lawful purposes only. We do not ship to restricted states or localities. Final determination of legality rests with the buyer.

FAQ

What tools are needed to complete this 80% lower?

Completion requires a drill press or milling machine, a compatible router jig, appropriate end mills and drill bits, and secure vise setup. Basic machining knowledge and safety protocols are essential. We recommend using a dedicated completion jig designed for this model.

Is this lower receiver serialized?

No. As an unfinished 80% lower, it does not qualify as a firearm under federal law and therefore does not require a serial number. Upon completion into a functional receiver, you may be required by state law to serialize it; you are responsible for knowing and following all applicable laws.

Do you provide instructions or the completion jig?

Detailed step-by-step instructions are widely available from reputable sources online. The completion jig is a critical tool and is sold separately. Ensure you purchase a jig specifically designed for this P80-002 model lower receiver for proper alignment and results.

Ready to begin your most rewarding build project? Add this high-quality billet 80% lower to your cart now. Available for purchase and fast shipping to Texas, Florida, Arizona, Nevada, Montana, Wyoming, Idaho, Utah, Alaska, Colorado, Georgia, Tennessee, North Carolina, Virginia, Pennsylvania, Ohio, Michigan and all other eligible US states.