Polymer80Buy.com Exclusive: Billet .308 80% Lower Receiver
Price: $141.90
This is the foundation for a serious .308 build. We’re talking about a solid, one-piece billet 6061-T6 aluminum lower, machined right here in the USA. It’s not a flimsy forging – it’s cut from a solid block of aluminum for superior strength and a cleaner, more precise fit for your LR-308/AR-10 platform.
We’ve left off the Fire/Safe markings to give you a clean slate. The anodized black finish isn’t for show; it’s a hard layer of protection against wear and corrosion. The magwell is professionally broached for smooth, reliable magazine changes, and the trigger guard is integrated and heavy-duty—no flimsy pins or bends here.
Key Specs:
- Material: Billet 6061-T6 Aluminum
- Finish: Type III Hardcoat Anodized Black
- Platform: .308 / LR-308 / AR-10
- Markings: No Fire/Safe Selector Engraving
- Features: Threaded Bolt Catch Hole, Broached Magwell, Integral Heavy-Duty Trigger Guard
- Origin: 100% Made in the USA
Build It Right. Build It Once.
The .308 platform is notorious for parts compatibility headaches. Save yourself the frustration. Pair this billet lower with our dedicated LR-308 Lower Parts Kit. It includes the correct hammer, trigger, and the specific threaded pin for the bolt catch that this lower requires. It’s the guaranteed way to ensure a smooth, functional build without the guesswork.
You Need to Know:
WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and reproductive harm. For more information, go to www.P65Warnings.ca.gov.
SHIPPING & LEGAL NOTICE: It is YOUR responsibility to know your local and state laws regarding 80% receivers and firearm manufacturing. We cannot ship to states or localities that prohibit these items. Check our shipping policy page for current info, but laws change frequently. We ship only within the United States. By purchasing, you confirm you are of legal age and that building this receiver is legal in your jurisdiction.
This is a quality, no-nonsense billet lower for the builder who demands a robust start to their .308 project. Get yours and build with confidence.





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