Liberty 80% Lower Jig (AR-15/AR-9)
Price range: $89.99 through $179.99
Description
You’ve heard the buzz over people building their own AR-15 rifles. Here’s how they do it. They take one of any number of varieties of forged or billet 80% lowers, put it in a jig. A jig is basically a template for how the rest of the lower should be machined away. Then they use a mere drill press and one or two other minor tools everyone has in their garage to remove the rest of the material from the lower. They they assemble the parts into a working AR-15. This is that jig. It’s the first step to getting you building.
PLEASE NOTE: Tooling for this jig is optional. You’ll need to select whether you would like accompanying tooling with your jig.
How the Liberty 80% Jig Works
The Liberty 80 lower Jig takes a largely vertical approach to cutting your AR-15’s receiver for the lower parts kit. Using the provided drill bits, you’ll first remove a large portion of aluminum from inside the main fire control cavity by drilling various pilot holes. Quick and easy.
You’ll then use the end mill bits for light cutting and cleaning up the receiver’s walls before cutting a hole for the trigger. Lastly, reinforced drill bushings on one side plate ensure your hammer, trigger, and safety pin holes are drilled perfectly through the receiver. No measurements required for these. Then you’re done! The whole process takes about 1 to 2 hours for first-timers.
It’s All in The Bits
The secret to the Liberty Jig isn’t just the plates, templates, and guides. The included bits are made from quality high-speed steel (HSS). These are commercial-grade bits that can eat through forged or billet aluminum in seconds, making fabricating multiple receivers as quick as it is simple.
Drill Bits & End Mill Bits Included
To make cutting and drilling as quick and easy as possible, Elite Builder included HSS bits: High-speed steel bits designed specially for gunsmithing and machining aluminum firearm receivers. The tool kit includes:
- (1) 5/8 Drill Bit – 6″
- (1) 3/8 Drill Bit – 5”
- (1) 5/32 Drill Bit – 3”
- (1) 3/8 Short End Mill – 3”
- (1) 3/8 Long End Mill – 4”
- (1) 5/16 Short End Mill – 4”
What’s Included
- (2) Steel Side plates
- (3) Template plates for fabrication
- (1) Set of drill bits (selectable option)
- (1) Set of end mill bits (selectable option)
What’s Required
- Drill Press
- Drilling Vise
- Machining Oil
- Eye Protection
- Ear Protection
With your receiver fabricated, you can install a lower parts kit and buttstock or brace, throw on an upper receiver of your choice, and hit the range in one day.
Specs
| Weight | 8 lbs |
|---|---|
| Dimensions | 12 × 6 × 4 in |
| Caliber | .223 Wylde, .300 AAC Blackout, 5.56, 9mm |
| Platform | AR15 |
| Include Tooling? | YES, NO |
36 reviews for Liberty 80% Lower Jig (AR-15/AR-9)
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Craig McMurray (verified owner) –
my download for the jig instructions expired before I had a chance to get them. I had no clue that it was timed
Kai Holmes (verified owner) –
Pretty simple, doesn’t have a depth gouge which would be helpful but it’s all good!
Nathaniel Peterson (verified owner) –
Have not used product yet, looking forward to using it. Would be nice to have a guide on how to use it.
Bill Errera (verified owner) –
This is a perfect jig for what I needed to do. I did, however, modify the jig a little bit and put pins in the top plates and drilled and reamed the side plates for Dowel holes so that when I put the top plates on, they are in the exact same place every time again I would buy this item again.
Heath Ramirez (verified owner) –
New to the 80% community, jig came without instructions, which made the experience a little more difficult. I have machining experience, and used my own tools. i rushed the job so i need to rework the part, but i needed to go to another website to find the depth of pocket to mill out.TLDR instructions and maybe a basic drawing would take this to a 4 or a 5 star.
Well built (verified owner) –
Well built but my polymer lower doesnt fit or my 45 lower just standard milspec lowers work until i plain the magwell holding plates a little.
michael mcintire (verified owner) –
nice jig, very well constructed. great service and price. A++++++++++++++++
john george (verified owner) –
Top plate being wider than bottom makes things harder. Nice setup overall.
Jake Simpson (verified owner) –
Quality seems good. Like the drill bushings
Rodger Wilson (verified owner) –
The jig worked very well. The lower came out looking and working just fine. Thanks to Steve and the folks at GunBuilders for providing the products needed for my hobby.