80 LOWER JIGS
An 80% lower jig is the only way for an AR-15 builder to complete their 80 lower receiver with accurately drilled pin holes, and a properly milled fire control cavity for the trigger, hammer, and other components. Since, by design, an 80% lower still requires the builder to complete the last 20% of the milling process to make the receiver functional, an 80% jig removes the need for making complex calculations or programming a CNC machine.
How an 80% Jig Works
Instead, the 80 percent lower jig provides pre-designed cutting and milling templates to be used in tandem with a drill press or mini-mill. Each jig also comes with “template” plates that provide guides holes for drilling the pin holes for the lower parts kit:
Our store carries both AR15 Jigs and AR-10 Jigs for 5.56 NATO and .308 Winchester builds. They are designed with safeguards in place so that you do not drill too deep or mill out more than necessary. Also included are the required drill bits for the pinholes, and end mill bits for cutting inside the receiver.
No Experience Necessary
While the actual milling process takes some attention to detail, it is a fairly straightforward process and all our 80 lower jigs come complete with easy step-by-step instructions. Also, the individual components of each jig are clearly labeled for tooling and measurements and coordinate with the instructions to ensure your AR-15’s finished receiver is a strong and sound success!
Benefits of an 80 Lower Jig:
- Allows for easy cutting and drilling of receiver
- Comes complete with step-by-step instructions
- Can be reused to complete multiple 80% lower receivers
- Easy to use for beginner gunsmiths and builders
- Made in the USA
80% Jigs: Frequently Asked Questions
Some AR-type 80% jigs will work with all mil-spec, or forged, 80% lowers. Other jigs are made to fabricate just one type of 80% lower or 80% frame. Polymer80’s frame jigs are made to fit a corresponding model of frame or lower.
Polymer jigs are made to be disposable, but they can be used more than once if you’re careful when you machine. Aluminum 80% jigs are reusable, and can typically complete 2 to 4 80% lowers or frames.
Besides the jig, all you need is a drill press or mini-mill, a vise, and some machining oil. Our AR lower 80% jigs come with the required drill bits and end mill bits. Polymer80’s pistol jigs may require hand files, a handheld drill, snips, or a Dremel to complete the corresponding 80% frame.
An 80% lower jig is the only way for an AR-15 builder to complete their 80 lower receiver with accurately drilled pin holes, and a properly milled fire control cavity for the trigger, hammer, and other components. Since, by design, an 80% lower still requires the builder to complete the last 20% of the milling process to make the receiver functional, an 80% jig removes the need for making complex calculations or programming a CNC machine.
How an 80% Jig Works
Instead, the 80 percent lower jig provides pre-designed cutting and milling templates to be used in tandem with a drill press or mini-mill. Each jig also comes with “template” plates that provide guides holes for drilling the pin holes for the lower parts kit:
Our store carries both AR15 Jigs and AR-10 Jigs for 5.56 NATO and .308 Winchester builds. They are designed with safeguards in place so that you do not drill too deep or mill out more than necessary. Also included are the required drill bits for the pinholes, and end mill bits for cutting inside the receiver.
No Experience Necessary
While the actual milling process takes some attention to detail, it is a fairly straightforward process and all our 80 lower jigs come complete with easy step-by-step instructions. Also, the individual components of each jig are clearly labeled for tooling and measurements and coordinate with the instructions to ensure your AR-15’s finished receiver is a strong and sound success!
Benefits of an 80 Lower Jig:
- Allows for easy cutting and drilling of receiver
- Comes complete with step-by-step instructions
- Can be reused to complete multiple 80% lower receivers
- Easy to use for beginner gunsmiths and builders
- Made in the USA
80% Jigs: Frequently Asked Questions
Some AR-type 80% jigs will work with all mil-spec, or forged, 80% lowers. Other jigs are made to fabricate just one type of 80% lower or 80% frame. Polymer80’s frame jigs are made to fit a corresponding model of frame or lower.
Polymer jigs are made to be disposable, but they can be used more than once if you’re careful when you machine. Aluminum 80% jigs are reusable, and can typically complete 2 to 4 80% lowers or frames.
Besides the jig, all you need is a drill press or mini-mill, a vise, and some machining oil. Our AR lower 80% jigs come with the required drill bits and end mill bits. Polymer80’s pistol jigs may require hand files, a handheld drill, snips, or a Dremel to complete the corresponding 80% frame.
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