Our updated billet AR-15 billet 80% lower with a quality lower parts kit.
Grab a quality, mil-spec LPK to pair with your new 80% lower and save! We've bundled a quality parts kit with our new billet lower to offer a convenient 2-for-1 package that makes your custom AR-15 build easier and more affordable.
The next generation of our precision-machined 80% lower features a new design with reinforced side walls and thicker aluminum, this 6061-T6 receiver blank is cut to exact tolerances and built to withstand serious abuse.
Billet 80% Lower Specifications
- Compatibility: 5.56/.223, 300 BLK, 6.5 Grendel
- Construction: Billet 6061-T6 Aluminum
- Finish: Raw (ready for custom coating!)
- Color: Bare Aluminum
- Fitment:100% Mil-Spec
- Fire/Safe Engraving: No
- 100% Made in the USA with quality tooling
Lower Parts Kit Specifications
- Includes full fire control group (hammer, trigger, disconnector, safety)
- Includes all required springs and pins
- Includes front and rear takedown pins
- Includes M4-style pistol grip
- Mil-spec, single-stage trigger
- Requires buffer tube kit to complete lower assembly
Need Help Assembling Your Lower and LPK?
Once you've cut and drill your lower, follow our step-by-step picture guide to install your lower parts kit.
Not sure which parts to pick? Read our Ultimate Guide on How to Build an AR-15.
New to building custom guns? Read our FAQ: What Is An 80% Lower?
WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings.ca.gov
Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily.
80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.
- Caliber:
- .223 Wylde
- Caliber:
- 5.56
- Caliber:
- .300 AAC Blackout
- Platform:
- AR15
- Finish:
- Anodized
- Material:
- Billet 6061-T6 Aluminum
