Picking the right upper and lower for your custom AR-15 build can be a challenge. So, we put together two high-quality matching billet receivers to help you get started.
Made from 6061-T6 aluminum, both the stripped upper and the 80% lower receiver are made to be lightweight but tough. We've thrown in a dust cover and forward assist assembly to get you started -- now you can pick all the custom, upgraded components you want to build a custom, quality AR-15!
Upper & Lower Receiver Combo Features:
- Includes M4 upper
- Includes 80% lower
- Matching anodized finish
- Cut from 6061-T6 Aluminum
- Forward assist and dust cover included
- Compatible with all mil-spec AR-15 parts
How to Finish Your AR-15 80% Lower
Cutting and drilling your 80% lower to make it functional requires an AR-15 jig. We recommend the Elite Builder Jig, available here -- it's capable of finishing all three lowers included in this bundle. Follow these detailed, step-by-step instructions to fabricate your 80% lower using the Elite Builder Jig.
Assembling Your Upper and Lower
Once your lower is fabricated, it's time to assemble it. You'll need an AR-15 lower parts kit, available here, and a buffer tube kit. Follow our step-by-step picture guide for installing your lower parts kit and buffer assembly.
To assemble your upper receiver, follow our video guide!
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.