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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.
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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.
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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.
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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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Easy Jig® Gen 3: Help

Instruction Manual

Video Instructions

Frequently Asked Questions 

 

What does the Gen 3 jig do better than the Gen 2?

How do I know what toolkit to select?

How do I measure my router threads?

 

 

 

 

What does the Gen 3 jig do better than the Gen 2?

Lots of things! We started designing the Easy Jig® Gen 3 with the most secure receiver mounting system in a jig yet. Once we made sure we had the tightest lockup we could achieve, we decided we needed to make the end mill more secure as well, which led to our heat-shrink support system. This allows the end mill to remail more rigid, leading to less total runout, and less chatter, giving you a CNC like finish. Finally, we re-designed our guide system to be more precise, and allow for less user-error. All of this leads to easier and faster results, every time. 

  

How do I know what toolkit to select? 

We have two easy sizing guides for you right here: Quick Reference Guide - Measure Your Router

 

How do I measure my router threads?

Check out this resource.