cc-settings-icon BUILD AT HOME
80% Arms sells AR-15 and .308 80% Lower Receivers, 80% Lower Jigs and other accessories which allow you to legally build a firearm at home in most states.
We utilize state of the art 5-axis CNC machines to mill all our .308 and AR-15 80 percent lower receivers to incredibly precise tolerances using premium billet aluminum.
We also offer our patented AR-15 and .308 Easy Jigs® which is the first 80% lower jig that makes it ridiculously easy for a non-machinist to finish their 80% lower in under 1 hour with no drill press required.
Products manufactured by 80% Arms carry a lifetime warranty against manufacturing defects. We will promptly replace or repair any product that we determine to be defective.

Upper Receivers

What is an Upper Receiver?

An AR15 Upper Receiver, also commonly called an “AR15 Upper”, or simply, an “Upper”, is the heart and soul of your rifle. It houses your bolt-carrier group, your barrel, supports your handguard or rail system choice, and wears your optics on top. When it comes down to what kind of rifle you are building, those decisions are made in your upper receiver. We build our own upper receivers in-house, to exactly how you order it, so you get an upper to fit your exact needs. 

How can I customize? 

We offer a variety of components to help you add the perfect upper to your rifle:

Barrel Twist Rates & Finishes   Muzzle Devices
Calibers Handguard Systems and Lengths

All uppers are assembled in house by a Marine Reservist Armorer, to your exact specifications. Of course, we also offer several third party AR15 Upper Receivers and M4 Uppers as well, with quality offerings from Aero Precision, CMMG, and Spike’s Tactical. Whatever upper you choose, you can be sure you’ll be on target. Need help deciding? Want a complete build kit instead? We wrote a few articles to help you out!

All products backed by our lifetime guarantee!