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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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Router Compatibility

Easy Jig® Gen 3 supports more routers than any other jig on the market. Please note, it is physically impossible for us to obtain every router that was ever made in the past, so many older models have not been tested for compatibility. We will make our best effort to add support for older discontinued router models over time if enough customers request support for any given model.

Below is a list of routers tested with Easy Jig® Gen 3. This list is also available in appendix A of the manual.

Our new Speed Mill™ (a 5/16 End Mill fused with a threaded housing) comes in for different sizes: 1/A, 2/B, 3/C, and 4/D. This sizing refers to the threaded portion of the Speed Mill™ that screws directly on the router's "spindle.” Size 1/A has the smallest housing diameter and size 4/D has the largest 

 
 

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