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.

Parts & Accessories


Whether you built one of our Rifle Kits, or one of our 80% Pistols, no build is complete without making it truly yours. We don't just carry the best 80% Lowers and build kits in the industry, we also carry everything you need to make sure your new firearm will fit whatever role you need it to fill. Every tool is different, and we want to make sure you have what you need to accomplish your mission. No gun is complete without some magazines to feed it, and we also offer a variety of other upgrades:
In California? Make sure to check out our California Compliance Kit and California AR 15 Parts.

All Your 80% Lower Needs

Make sure you represent yourself as part of the 80% Army whenever you're at the range with some of our swag, and be the envy of your coworkers with one one of our desktop rifle kits. Just want to touch up and cover that bare aluminum inside your freshly milled lower? Grab a bottle of Aluminum Black to add some finishing touches.