An 80 lower jig (also called an 80% or 80 percent lower jig) holds your unfinished AR receiver and guides every cut, so you can finish the fire control pocket and pin holes accurately. Every jig we carry is built for a drill press, not a router, and can be reused for more builds. Pick the jig for your platform — AR-15, AR-9 or AR-10/LR-308 — then add the tooling kit if you don’t already have the bits. Compare our jigs below.
| Jig | Platforms | Method | Tooling | Price | Rating |
|---|---|---|---|---|---|
| Elite Builder 80% Lower Jig (AR-15/AR-9) | AR-15, AR-9 | Drill press | Optional | $149.99–$254.99 | 4.8 (107 reviews) |
| The Elite Builder Patriot 80% Lower Jig - AR9/AR10/AR15 | AR-15, AR-9, AR-10/LR-308 | Drill press | Optional | $229.99–$339.99 | 4.6 (30 reviews) |
| Elite Builder 80% Lower Jig (AR-10/.308) | AR-10/LR-308 | Drill press | Optional | $149.99–$264.99 | 4.8 (17 reviews) |
| Liberty 80% Lower Jig (AR-15/AR-9) | AR-15, AR-9 | Drill press | Optional | $89.99–$179.99 | 4.6 (36 reviews) |
Building more than one platform? The Patriot covers AR-15, AR-9 and AR-10 in one jig. Building one AR-15 on a budget? Start with the Liberty.
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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…
Now compatible with AR-10/LR-308, AR-15 and AR-9! With its steel plates and precision machining, the Elite Builder has been a favorite among AR-15 and AR9 80% builders. Now, we’ve included new plates to fit AR-10, LR-308 and .308 80% lowers! The EB Jig can now complete virtually any receiver for the AR’s numerous calibers. You…
The fast, accurate, bombproof 80% Lower Jig from Elite Builder now ships with equally high-quality drill bits and end mill bits. This gunsmithing combo kit allows you to confidently cut and drill multiple AR-15 and AR-9 80% lower receivers without losing speed or accuracy. Hardened steel template plates and a self-aligning design make machining quick…
These are the four replacement top plates for the Elite Builder 80% Lower Jig. You can choose the one you need to replace or the set of all four plates together. These plates are compatible with both the AR15/AR9 and the AR10/.308 version of the Elite Builder 80% Lower Jig.
The popular, affordable Elite Builder 80% Jig has been reconfigured to serve the ever-growing .308 AR market: Re-tooled to accept the DPMS-patterned LR-308 80% lowers, the Elite Builder Jig allows any shooter to part together an accurate, custom .308 rifle from scratch without breaking the bank. You can also now choose to include the enhanced…
Cutting and drilling your 80% lower receiver can be a breeze, or a pain — it truly depends on the drill bits and end mill bits you use to machine it. That’s why you need to invest in the highest quality bits available, like this 80% Jig Tool Kit from AMT. These HSS bits are…
If you’re looking for a little more precision while you’re using the Elite Builder Jig to drill out your 80% lower, then you need to see this. We now offer a plate “E” to enhance drilling out the fire control group pocket of your 80% lower receiver. Using this plate will create several smaller holes…
These extra machining plates will convert your AR-15/AR9 Elite Builder Jig into the Elite Builder Patriot 80% Lower Jig. If you want to invest in a new .308 or 6.5 Creedmoor build kit and you want to use your EB Jig to finish for yourself the 80% receiver on which the kit is based, this is…
These extra machining plates will convert your AR-10 Elite Builder Jig into the an Elite Builder Patriot 80% Lower Jig. The Patriot setup works with AR-10 / LR-308 80% lower receivers, too. If you want to invest in a new .223 of 5.56mm AR build kit and you want to use your EB Jig to…
Juggernaut Tactical 80% Lower Jig Tooling (1) 0.484″ Cobalt Drill (1) 0.375″ Cobalt Drill (1) 0.156″ Cobalt Drill (2) 0.125″ Cobalt Drill (1) 3/8″ Carbide Endmill (1) 1/4″ Carbide Endmill
Liberty 80% Lower Jig – Milling Plate
An 80% lower is an unfinished AR receiver. The jig clamps it in place: two side plates secure the lower, and a set of top plates gives you the template for cutting the fire control pocket for the trigger, hammer, sear, disconnector, safety selector and springs. Each side plate has guides for drilling the pin holes your lower parts kit needs. Every AR jig we sell works this way, whether you’re building an AR-15, AR-9 or AR-10, in aluminum or polymer.
New to building? Start with What is an 80% jig? and the 80% jig compatibility guide.
Match the jig to your lower. AR-15 and AR-9 lowers share a jig; AR-10/LR-308 lowers need the .308 jig or the Patriot, which covers all three.
A drill press. Every jig we sell is designed for a drill press and is not designed for use with a router or laminate trimmer.
Tooling is optional. Choose the tooling option to get the drill bits and end mill you need, or buy tooling and replacement plates later.
Yes. The jigs are reusable, and replacement top plates and drill plates are available when they wear.
No. Polymer80 frames shipped with their own jig. If you’re finishing a P80 or G80 frame, see our P80 frame parts and build kits.
Contrary to federal law, some states have either restricted or banned the sale, transfer, and ownership of 80% lowers, firearm blanks, and other gun parts. Because of these restrictions, we cannot ship our products to certain states. Please confirm whether your state is restricted on our Shipping & Return Policy before placing an order. We cannot fulfill orders to restricted states if placed.
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