.308 80% Lower – Billet
About this product
Polymer80Outlet Billet .308 80% Lower Receiver
$141.90
Build a solid foundation for your .308/AR-10 platform. This isn’t a flimsy part; it’s the core of a serious rifle.
Built Right, Here in the USA
We start with a solid block of 6061-T6 billet aluminum, not a cheap forging. We machine it to precise specs, resulting in a lower receiver that’s exceptionally rigid. The anodized black finish isn’t just for looks—it’s a hard layer of protection against wear and corrosion. This is a permanent piece of your build.
Key Features & Specifications:
- Material: 6061-T6 Billet Aluminum
- Finish: Type III Hardcoat Anodized, Black
- Platform: .308 / LR-308 / AR-10
- Includes: Threaded bolt catch hole (pin not included for compatibility with various LPKs).
- Machining: Broached magwell for smooth magazine changes. Heavy-duty, integral trigger guard.
- Markings: This is a blank canvas. No Fire/Safe engravings are applied.
- Origin: 100% Made in the USA.
Get the Right Parts for the Job
The .308 platform has variations. To save you headaches, we strongly recommend pairing this billet lower with our dedicated LR-308/AR-10 Lower Parts Kit. It’s built to fit, includes the correct threaded bolt catch pin, and ensures a smooth installation. Don’t guess with parts compatibility.
Important Information You Need to Know
This is an 80% lower receiver. It is not a firearm and requires machining to completion. You are responsible for complying with all federal, state, and local laws regarding the manufacture and ownership of firearms.
Shipping Restrictions Apply. We cannot ship to certain states or jurisdictions with restrictive laws (e.g., CA, NJ, NY, CT, etc.). It is your responsibility to know your local laws before ordering. Check our current shipping policy for details.
WARNING: Products sold here can expose you to chemicals like lead, which is known to the State of California to cause cancer and reproductive harm. For more information, go to www.P65Warnings.ca.gov.
This billet .308 lower is for builders who understand the value of a solid foundation. Get yours and start a proper build.
Specs at a glance
What's in the box
- .308 80% Lower – Billet