Skip to main content
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.

80% BLOGS

.300 Blackout Barrel Length Guide & Tips

.300 Blackout Barrel Length Guide & Tips

80 Percent Arms | Jul 19th 2023

What is 300 blk good for? That's really what everyone wants and needs to know — why spend more money on an expensive caliber for an AR15 build when you could just shoot .223 or 5.56 NATO? Wha...
Read More read more button read more button
9mm vs 10mm: Which One is Better?

9mm vs 10mm: Which One is Better?

80 Percent Arms | Jul 14th 2022

One of the age-old debates amongst gun enthusiasts is over the 9mm and 10mm rounds. Which is best - 9mm or 10mm for your handgun or pistol caliber carbine? Both have pros and cons so which one sh...
Read More read more button read more button
Rimfire vs Centerfire Ammunition

Rimfire vs Centerfire Ammunition

80 Percent Arms | Nov 24th 2021

What is rimfire ammunition? What is centerfire ammunition? This cartridge, that cartridge — what’s the difference right? Well when it comes to rimfire ammo, the best example is the .22 Lon...
Read More read more button read more button
AR 40 Build Guide

AR 40 Build Guide

80 Percent Arms | Oct 27th 2021

Are you a fan of .40 cal? So are we! Let’s face it, if it goes pew, chances are we’re going to like it. During the height of the pandemic, 40 S&W ammunition was significantly chea...
Read More read more button read more button
What is 223 Wylde and Should You Use It?

What is 223 Wylde and Should You Use It?

80 Percent Arms | Aug 27th 2021

Some of you may have seen this caliber-looking designation around online but be confused by it. Don’t worry, we were at one point too. So what the heck is .223 Wylde right? Is it a barrel, is it a...
Read More read more button read more button