.308 80% Lower – Billet

If you are looking to build a precision long-range rifle or a heavy-hitting battle rifle from the ground up, the .308 80% lower – billet is where your project starts. Machined from solid 7075-T6 aluminum, this billet lower gives you the foundation for a custom .308 platform without the serialized paperwork. It is a clean, rugged blank that puts the build process squarely in your hands. Whether you are a seasoned builder or a first-time mill user, this lower delivers the material and geometry you need to finish a reliable, match-grade firearm.

Overview

This .308 80% lower – billet is designed for the AR-10 / LR-308 platform and is compatible with most DPMS-pattern upper receivers. It comes as an unfinished forging, meaning the fire control pocket, trigger slot, and sear block are already machined to spec. You complete the remaining material removal yourself using a jig and a drill press or router. The billet construction ensures tighter tolerances and a cleaner grain structure compared to forged lowers, which translates to a smoother action and better fit over the life of the rifle. This is a no-nonsense part for builders who value strength and accuracy over flashy coatings.

Features & Specs

The .308 80% lower – billet is built around durability and precision. Each blank starts as a solid block of 7075-T6 aluminum, then is machined to 90% completion, leaving only the trigger pocket, hammer pin holes, and safety selector detent channel for you to finish. Here is what you get out of the box:

• Material: 7075-T6 aluminum billet, hard coat anodized black per Mil-A-8625 Type III
• Compatibility: DPMS-pattern .308 upper receivers and standard AR-10 LPK components
• Pocket geometry: Pre-machined rear takedown pin lug, bolt catch pocket, and buffer tower threads

Additional specs include a flared magazine well for easier reloads, a threaded bolt catch pin hole, and a full-length integrated trigger guard. The lower accepts all standard .308 small-frame parts kits and uses A2 or A1 grip styles. The billet construction eliminates the seam lines found on forged lowers and provides a consistent wall thickness throughout the receiver.

Who It’s For

This .308 80% lower – billet is for the builder who values hands-on craftsmanship and wants a long-range or hunting rifle without the FFL transfer process. It is ideal for machinists, gunsmiths, and DIY enthusiasts who own a drill press or router and have a basic 80% lower jig. If you plan to shoot 500-yard groups or hunt elk with a heavy-hitting .308, this lower gives you the platform to build a precision tool that matches your specific barrel, stock, and trigger choices. It is not for someone looking for a quick snap-together build, but for the builder who wants to own every step of the process.

Shipping & FFL

Because this .308 80% lower – billet is not a serialized firearm and does not meet the definition of a receiver under ATF regulations, it ships directly to your home or business. No FFL transfer is required at the time of purchase. However, once you complete the machining and assemble it into a functional firearm, you must comply with all federal, state, and local laws regarding possession and use. Some states and municipalities have specific restrictions on 80% lowers. It is your responsibility to verify local laws before ordering. We recommend keeping your work order and serializing the finished lower per your state requirements. No signature is required for delivery, but we ship with adult signature confirmation for security.

• No FFL needed for purchase or delivery of the unfinished lower
• Check your state and local laws before ordering (restrictions may apply in CA, NY, NJ, WA, CO, and others)
• Once finished, the completed lower must comply with all federal and state firearm regulations