.308 80% Lower – Billet

For builders who demand precision and reliability in a large-frame platform, the .308 80% lower – billet offers the ideal foundation for a custom AR-10 or DPMS-pattern rifle. Machined from solid 7075-T6 aluminum billet, this lower receiver is designed for the serious hobbyist or small-volume manufacturer who values control over the build process. Its 80% completion status means you complete the final machining steps yourself, allowing you to create a firearm that is truly yours without serialization requirements at the time of purchase. This is not a generic casting; it is a billet component built to tight tolerances for a superior fit with your upper receiver and parts kit.

Overview

The .308 80% lower – billet is a precision-machined component intended for use in large-frame rifle builds. Manufactured from a solid block of 7075-T6 aluminum, this lower is designed to accept standard AR-10 or DPMS-compatible parts and magazines. The 80% completion level means the critical fire control pocket, trigger pin holes, and selector detent channels are pre-machined. The end user is responsible for completing the remaining material removal, including the trigger pocket depth, hammer and trigger pin holes, and the safety selector hole. This lower provides the builder with full control over the final assembly and finish quality.

Features & Specs

This .308 80% lower – billet is engineered for strength and dimensional accuracy. The billet construction ensures a dense, void-free structure that resists flex under heavy recoil. Key specifications include a hard-coat anodized Type III Class 2 finish for corrosion resistance and a reinforced front takedown pin boss for increased durability. The integrated trigger guard is machined as part of the billet, eliminating a potential failure point. The lower is compatible with standard DPMS-pattern .308 buffer tubes, stocks, and pistol grips.

• Material: 7075-T6 aluminum billet, heat treated to T6 condition for maximum tensile strength.
• Finish: MIL-SPEC Type III Class 2 hard-coat anodized, matte black.
• Compatibility: DPMS-pattern .308 / AR-10 parts and magazines; accepts standard AR-15 pistol grip threads.
• Pre-machined features: Fire control pocket, bolt catch recess, rear takedown pin detent hole, and buffer tube threads.
• Unmachined features: Trigger pocket depth, hammer and trigger pinholes, safety selector hole, and front takedown pin detent hole.

Every .308 80% lower – billet is inspected for critical dimensions before shipment. The billet construction process allows for tighter tolerances than forged lowers, resulting in a better overall fit with your upper receiver and reduced play between components. This is a parts category item, not a complete firearm, and is intended for use with a legally compliant completion kit.

Who It’s For

This product is designed for the experienced builder who has access to a drill press, end mill, or router jig and possesses the skills to complete the lower’s machining. It is ideal for those who want a large-frame platform without the overhead of a serialized receiver purchase. The .308 80% lower – billet is also well suited for small-scale armorers who need a consistent, high-quality base for custom builds. If you are building a precision long-range rifle, a hunting platform, or a durable battle rifle, this billet lower provides the strength and accuracy you need. It is not for first-time builders who lack machining experience or proper tooling. You must be legally eligible to possess and complete a firearm receiver in your jurisdiction.

Shipping & FFL

This .308 80% lower – billet is classified as a non-firearm item under federal law and can be shipped directly to your home or business address without an FFL transfer. No background check is required for purchase. However, you must be at least 18 years of age to order. Shipping is available to all US states and territories where such items are legal. We strongly recommend checking your local and state laws regarding the possession and completion of 80% receivers before ordering. Some states, such as California, New York, New Jersey, Connecticut, Washington, and others, may have restrictions or require an FFL transfer. It is your sole responsibility to ensure compliance with all applicable laws. No returns are accepted on machined or modified items. By purchasing this .308 80% lower – billet, you acknowledge that you are legally permitted to own and complete it in your jurisdiction.