.308 80% Lower – Billet

The .308 80% lower – billet represents a foundational component for the discerning builder seeking a large-frame platform. Machined from solid 7075-T6 aluminum, this billet lower receiver is designed for those who prefer to complete their own firearm build. It offers a robust starting point for a custom .308-caliber rifle, providing the structural integrity and dimensional accuracy required for reliable performance. This component is un-machined in critical fire control areas, requiring the end user to complete the material removal process.

Overview

This .308 80% lower – billet is a precision-machined component intended for use with standard AR-10 / LR-308 pattern parts. It is produced from a solid billet of 7075-T6 aluminum, a material chosen for its strength-to-weight ratio. The lower features a Type III hard coat anodized finish for corrosion resistance and durability. As an 80% receiver, it is not a firearm and may be purchased without a Federal Firearms License (FFL) transfer. The end user is responsible for completing the machining to the fire control pocket and trigger pin holes.

Features & Specs

• Material: 7075-T6 billet aluminum, offering superior tensile strength over forged alternatives.
• Finish: Type III Class 2 Hard Coat Anodized, matte black, for wear resistance.
• Compatibility: Designed for DPMS High / LR-308 pattern uppers and parts kits.
• Construction: Billet machining provides tighter tolerances and sharper details compared to cast or forged receivers.
• Weight: Approximately 11.5 ounces, maintaining a balanced profile for a large-frame lower.
• Markings: Includes a pre-machined serial number area and manufacturer markings on the magwell.

Who It’s For

This .308 80% lower – billet is intended for experienced builders who possess the necessary tooling and expertise to complete a receiver. It is suitable for the hobbyist who values precision machining and wants to construct a custom large-frame rifle from a solid billet platform. This product is not for the novice builder. It assumes the user understands the specific jig requirements and end mill sizes for the .308 fire control pocket. The completed receiver is intended for use in rifles built for target shooting, hunting, or competition, and is not intended for any purpose other than lawful firearm construction.

Shipping & FFL

This .308 80% lower – billet is not a firearm as defined by the Gun Control Act of 1968. It can be shipped directly to your residence or business address. No Federal Firearms License (FFL) transfer is required for purchase. However, once you complete the machining process, the finished receiver becomes a firearm. You must comply with all applicable federal, state, and local laws regarding the possession and manufacture of firearms. It is your responsibility to verify that completion of this 80% lower is legal in your jurisdiction. We recommend consulting with a legal professional if you have any questions regarding local regulations. No FFL transfer is required for this item.

• All sales are final on 80% lowers due to their unfinished state.
• No returns or exchanges on machined or completed receivers.
• This product does not require a background check for purchase.
• You must be 21 years of age or older to purchase.

• Machining instructions are not included. The user is expected to be proficient with a router or mill.
• Recommended jig: .308-specific 80% jig with 5/32″ and 3/8″ end mills.
• This .308 80% lower – billet is compatible with standard AR-10 buffer tubes and stocks.
• Trigger group: Accepts standard AR-10 / LR-308 drop-in triggers.

This .308 80% lower – billet is a direct path to building a custom large-frame rifle. It offers the fit and finish of a premium billet component at a competitive price point. Build with confidence.