.308 80% Lower – Billet

When building a precision long-range rifle or a reliable battle rifle platform, the foundation must be unforgivingly accurate and durable. The .308 80% lower – billet is your starting point for a custom AR-10 pattern build that demands strength and tight tolerances. Machined from solid 7075-T6 aluminum, this component provides the structural integrity required for the .308/7.62x51mm cartridge while allowing you to complete your firearm project at home. Every edge and pocket on this .308 80% lower – billet is designed for a seamless fit with DPMS pattern upper receivers and parts kits.

Overview

This .308 80% lower – billet is a precision-crafted, unfinished receiver blank that puts you in control of your build. Unlike forged lowers, the billet manufacturing process begins with a solid block of aircraft-grade aluminum, which is then CNC-machined to exacting tolerances. This results in a lower receiver with a more uniform grain structure and superior material consistency. The 80% completion state means the critical fire control pocket and trigger pin holes are pre-machined; you complete the remaining material removal to finalize the receiver. Whether you are a first-time builder or an experienced machinist, this .308 80% lower – billet offers a reliable, cost-effective path to a custom large-frame AR.

Features & Specs

Built for function over flash, this .308 80% lower – billet prioritizes accuracy and longevity. Every dimension is held to strict tolerances to ensure compatibility with DPMS Gen 1 pattern components. The billet construction eliminates the parting lines and potential stress points common in forged receivers.

• Material: 7075-T6 aluminum billet, type III hard coat anodized in black for corrosion resistance and durability
• Pattern: DPMS Gen 1 (High Profile) compatible; accepts standard AR-10/SR-25 pattern parts kits and buttstocks
• Machining: Fully CNC-machined with integrated trigger guard, flared magazine well for faster reloads, and threaded bolt catch pin

Additional technical details include a rear takedown pin detent channel already drilled, and an oversized bolt catch pocket for ambidextrous catch options. The receiver is designed with a tensioning screw to eliminate upper-to-lower play, enhancing accuracy potential. This .308 80% lower – billet weighs approximately 12.5 ounces before final machining, keeping your overall build weight manageable.

• Finish: MIL-SPEC Type III Class 2 hard coat anodized (black)
• Pocket Dimensions: Accepts standard AR-10 LPK (fire control group and hammer/trigger pins)
• Compatibility: Works with DPMS Gen 1 High Profile uppers and most aftermarket handguards

Who It’s For

This .308 80% lower – billet is designed for the builder who demands precision. It is ideal for long-range target shooters who want a custom match-grade rifle, hunters needing a reliable heavy-caliber platform, and hobbyists who enjoy the process of completing a firearm from a receiver blank. If you have access to a drill press, jig, and basic machining tools, this lower gives you the flexibility to choose your own trigger, stock, and grip without paying a premium for a pre-assembled receiver. It is also suited for those who prefer the tighter tolerances and cleaner aesthetics of a billet receiver over a forged unit. This is not a drop-in part; it requires final machining and is intended for personal use.

Shipping & FFL

This .308 80% lower – billet is not a firearm and is not serialized. As an 80% receiver, it does not require transfer through a Federal Firearms License (FFL) dealer for shipment. We ship directly to your door via UPS or FedEx, with no additional transfer fees. You must comply with all federal, state, and local laws regarding the ownership and completion of 80% receivers. It is your responsibility to verify that possession and completion of this .308 80% lower – billet is legal in your jurisdiction. We strongly recommend consulting with legal counsel if you have any questions regarding your local regulations. No refunds or returns on completed or modified receivers.

• No FFL required for shipment to your residence (check local laws first)
• Ships via insured ground carrier; adult signature may be required
• You are solely responsible for compliance with all applicable laws during and after completion