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.
cc-gun-icon INCREDIBLY PRECISE
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.
cc-hand-icon RIDICULOUSLY EASY
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.
cc-thumbs-icon 100% SATISFACTION GUARANTEED
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.

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The 3 Best (and Most Popular) AR15 Calibers

The 3 Best (and Most Popular) AR15 Calibers

80 Percent Arms | Dec 3rd 2019

Over 50 years since the AR-15s conception and adoption by the US Military, the options that are available to consumers have morphed the rifle into the most modular and customizable small-arms platf...
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What barrel twist-rate should I choose?

What barrel twist-rate should I choose?

80 Percent Arms | Nov 7th 2019

Picking the Right Twist Rate for You Asking for advice about twist rates at your local shop or range is about as useful as a soup sandwich. You will run into more theories, misinformed individuals, an...
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6.5 Creedmoor vs .308 Winchester

6.5 Creedmoor vs .308 Winchester

80 Percent Arms | Oct 28th 2019

This debate is much like when people compare the 9mm Parabellum to the .45ACP. Regardless of what we present, there are those who will have their hard headed preconceived notions on the two caliber...
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​Upgrading your AR15 at Home

​Upgrading your AR15 at Home

80 Percent Arms | Oct 14th 2019

One of the coolest aspects about the AR15 platform is how incredibly modular it is. It is, without a doubt, the most modular and up-gradable small arms platform on the face of the planet. Most ever...
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The 3 Best (and Most Popular) AR15 Calibers

What barrel twist-rate should I choose?

6.5 Creedmoor vs .308 Winchester

​Upgrading your AR15 at Home
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