80% Lower Jig for AR-10 and AR-15 - Ultimate Jig

$189.00
Jig Options
Quantity

After considering everybody's feedback regarding jigs, we were able to develop our Ultimate Jig. With this jig, you are now able to build both AR-10 and AR-15 80% lowers. Our alignment tool that ensures the pocket is always centered in combination with our oversized top plates allows for very smooth and consistent finishing. Pair that with our press-fit stainless steel drill bushings and depth gauge (included with the jig), and you will have yourself the perfect tool to finish any top-tier AR rifle. Besides your jig and tools, the only thing needed to get your project going is a drill press or a hand drill and router.

  • 17-4 Stainless Steel Drill Bushings
  • Alignment tool
  • Depth gauge for quickly setting tool length
  • CNC-machined from solid aerospace billet aluminum
  • Laser-etched Right/Left markings and drill hole sizes for convenience
  • Individually replaceable plates
  • Type III hard coat anodized
  • Optional high-quality tooling package includes all bits required to finish your AR-15 or AR-10 lower. These are the same bits we use in our commercial CNC machines at the Juggernaut Tactical factory
  • If instructions are properly followed, the jig kit can be used to finish 25 lowers or more
  • Made in the USA
  • Not guaranteed to fit all AR-10 lowers, due to differences in manufacturing

No longer comes with flashlight due to COVID-19-related delays.

Tooling package comes with:

  • 1 ea. 0.375" Cobalt Drill
  • 1 ea. 0.3125" Cobalt Drill
  • 1 ea. 0.156" Cobalt Drill
  • 1 ea. 5/16" Carbide Endmill

Click here if you already have a jig and would like to purchase only the tooling package.

For step-by-step video instructions on finishing your AR-10 or AR-15 80% Lower with our Jig Kit, go here.

For written instructions, go here.

Note: Our jigs are not compatible with billet lowers from 80% Arms or 5D Tactical, as they are not mil-spec on the outer dimensions.

Note: Due to ATF final rule 2021R-05F (more info here), you cannot order an 80% Lower and jig-related products at the same time. If you have both in your cart, you will not be able to complete the checkout process.

Recent reviews

5 out of 5 stars

Great Jig

The jig works great, both for 10's & 15's. One thought, the depth gauge could use a little better engineering for ease of use, and especially accuracy. It's just a bit flimsy when compared to the rest of the components.

Kelly G.

Verified
April 3, 2024

5 out of 5 stars

Amazing

Have used it for one 15 and one 10 lower. Both came out amazing. Very sturdy when put together. Highly recommend.

Jake H.

Verified
April 2, 2024

5 out of 5 stars

looked nice

should work well

TROY L.

Verified
March 26, 2024

5 out of 5 stars

80% AR-10/AR-15 ultimate jig

I have built 8 lowers with this jig and I find it very close to mil-spec and very easy to use.

Gaspar C.

Verified
March 26, 2024

4 out of 5 stars

Lower jig

One of the inserts for the trigger pin guide seems to be miss aligned. I had to fill in the drilled hole on the lower and redrill using the partially installed trigger as a guide.

Rodney

Verified
March 25, 2024

4 out of 5 stars

Great combo jig

To be honest the first lower was a test run. It turned out okay and made a nice weapon. Over the next few I realized there isn't enough surface area for the router so it would tend to lean and not make a clean cut. We put some angle iron ledges to support router and all is good. The jig itself works great for 15 and 10 lowers. If you use a full size router, stability can be an issue. I would buy again but in the state I live in, hairlip and sideshow are making it impossible to exercise our God given rights. Making what they call " ghost guns" illegal.

ACE

Verified
March 17, 2024

5 out of 5 stars

Gunsmithing hobby necessity.

One of the better jigs on the market.

Enthused q.

Verified
March 13, 2024

5 out of 5 stars

jiggy with it

honestly a brilliant piece of tooling that has been used and abused but very little wear when used properly. higher recommended, especially because the modularity between different caliber builds.

Kevin J.

Verified
March 12, 2024

5 out of 5 stars

Great Jig

I have only used it for an AR10 build so far, but it worked so well for the AR10 I plan a AR15 build soon. I saw a YouTube vid that trashed this jig. But having had machining experience in the past, it became obvious the user didn't know what he was doing. That said, I do recommend using a drill press for accuracy and ease of drilling out the big pocket. I also recomend when using the router to mill out the pockets, you find the drill hole to drop the end mill in before turning on the router. I could see a few broken end mills if you don't. I will also look at if I can drill out the trigger slot before milling. It would be helpful to have a third hand to turn on the router while you position and hold it with 2 hands. But 1 person can do it. Overall, it is very well-built and does the job nicely. I can see someone building a few dozen rifles with this jig.

Wiggledbits

Verified
March 6, 2024

5 out of 5 stars

Solid

Locks the lower in very solid and appears built to last. Very little wear.

Ian B.

Verified
March 6, 2024

5 out of 5 stars

Worked great

I have used jig twice. One ar-15 lower, and one ar-10 lower. Both came out perfect.

Thomas G.

Verified
March 3, 2024

5 out of 5 stars

works well

Used it many times now with no issues. Would and do recommend to anyone.

everett m.

Verified
March 2, 2024

5 out of 5 stars

Ultimate jig

Well worth the money too bad 80s arent a thing anymore.....

James S.

Verified
March 2, 2024

5 out of 5 stars

Great jig

Easy to use. Purchased some little LED flashlights from Harbor Freight and they work great in place of the light. Would recommend getting some backup bolts just in case of accidentally milling them.

Alex G.

Verified
March 1, 2024

5 out of 5 stars

This jig rocks on and on!

My Ultimate Jig has done an AR10 and 8 AR15's and is still in great shape. Highly recommended!

Noel S.

Verified
February 27, 2024

3 out of 5 stars

OK, but could be better.

This could use some revisions to make it better. It should come with spacers for the bottom two bolts to keep the 2 pcs parallel when tightening. I made my own and it helped a lot. Also, the 5/32" and 3/8" drilling guides could be made from a harder material and it would be worth while to make them longer. I made my own on my lathe and pressed them in to make for better alignment while drilling. The guides for milling the pockets are to tall. I ended up laser cutting flat plates to replace them and work much better and allow you to have a better view of your work piece when milling. It works to get the job done but could definitely be better.

Preston S.

Verified
February 26, 2024

5 out of 5 stars

Great Jig!

The only issue I had was not with the jig but with the tools I had on hand for the milling. The jig worked perfectly and everything worked great after buying different milling bits.

Chester P.

Verified
February 23, 2024

5 out of 5 stars

Hell yeah πŸ‘

Goodness as far as the eye can see Love it 😁

Dale P.

Verified
February 23, 2024

5 out of 5 stars

Ultimate jig

The ultimate jig was exactly what I was looking for. One stop shop for everything AR

Douglas F.

Verified
February 22, 2024

3 out of 5 stars

Good Product

Overall this is a good product. My only disappointment is with the drill jigs for the pockets. Being made of aluminum, they tend to wear after only2 or so lowers allowing the bits to wander. It seems they would be better with a hardened insert, or the entire block being made of tool steel.

D.S.

Verified
February 22, 2024

5 out of 5 stars

Heavy duty, well designed.

Good hardware. Pieces fit well, item seems indestructible.

David K.

Verified
February 20, 2024

5 out of 5 stars

First attempt

Solid design. Simple instructions. Can't wait to complete the first template.

Robert R.

Verified
February 20, 2024

5 out of 5 stars

80% Jig

Great craftsmanship. Built to last for many projects. Customer service was helpful and answered question in a timely fashion. The shipping took around 2 weeks, but to be expected, as demand is high. Thanks for a great product.

Monte

Verified
February 20, 2024

5 out of 5 stars

Very well made jig

I was pleasantly surprised by quality and workmanship of the item. Very precise and thoughtful design.

Piotr P.

Verified
February 20, 2024

5 out of 5 stars

Works Perfectly

Jig works perfectly. It is well built and well designed. I have completed a couple so far with zero issues.

Mark D.

Verified
February 20, 2024

5 out of 5 stars

Ultimate Jig

The jig is very well constructed, simple to use and allows the use of any router. The tooling is of very good quality and replacement parts are available for a very reasonable price. The only slight issue I've had it the side pl,ate bolts are just a hair too long, but the fix for that is just a matter filing the bolts down about 1/32 of an inch so the plates can tighten down all the way. That's not a big deal and I'd rather that than the bolts being too short. My overall experience has been great and Zack has always responded to any questions I've had. I am very pleased and highly recommend this jig for anyone looking to mill an 80% AR lower. By the way I live on the east coast and it only took a week or less to have the jig as well as following orders delivered to my door step; that's the way to run a business.

Anonymous

Verified
February 19, 2024

5 out of 5 stars

Everything worked great

Everything worked great

Justin W.

Verified
February 18, 2024

5 out of 5 stars

Awesome jig

I love this jig setup it makes everything fit nice and tight after cutting. I just wish it was made to cut other brand of 80% lowers, I had to modify my two side plates to fit a lower I got somewhere else but after I did that it did a really good job.

Ethan P.

Verified
February 18, 2024

5 out of 5 stars

Jig

The jig is awesome fit is spot on done a couple receivers worked perfectly on the first one

Matt H.

Verified
February 14, 2024

5 out of 5 stars

pretty good

it will get you really close but i needed alot of fine tuning to get the trigger to fit right

El G.

Verified
February 14, 2024

5 out of 5 stars

Freedom

It works great when you put a blank in each side of the jig. I think you guys should come out with a 80% lower for a 338 lapua 😁😊 have a blessed day.

B. C.

Verified
February 14, 2024

5 out of 5 stars

ultimate jig

this jig holds up to its name. Ultimate. what a piece of art. love it.

James R.

Verified
February 14, 2024

5 out of 5 stars

Best jig for the price

Best jig you can buy honestly! Nothing beats a dual platform jig!! Just wish mine came with the flashlight like the ones before the kungflu hit

TsiJamesfpv

Verified
February 14, 2024

5 out of 5 stars

The best jig ever

I brought a jig from another website that said there jig was made to mil spec standards and this is why I am completing this review. This jig from Jtactical was made for diy people like me who likes thing easy and simple to use. My build looks and operates great, I didn't have to call customer service because this jig was easy to use.

Maurice A.

Verified
February 14, 2024

5 out of 5 stars

Works great

Product works great love it

Thomas M.

Verified
February 10, 2024

5 out of 5 stars

AR-10 lower

Great product!

Jack M.

Verified
February 9, 2024

5 out of 5 stars

Awesome!!

Affordable and fast shipping, solid fit. Definitely recommend.

John L.

Verified
February 8, 2024

5 out of 5 stars

Easy

Very easy to use. I did use a drill press for all the hole but it can just as easily be done with a hand drill. I had no issues and the finished product works great.

John C.

Verified
February 6, 2024

5 out of 5 stars

Tactical Jig

Easy to use. Such a great invention!

Allen B.

Verified
February 5, 2024

5 out of 5 stars

Awesome product

The 3 in 1 jig, best purchase possible. Heavy duty jig. Definitely A++++ The video showing, " the how to " is priceless

Jim B.

Verified
February 5, 2024

5 out of 5 stars

Jig

Won't do billet lowers. Need adapters for billet.

Joe O.

Verified
February 5, 2024

5 out of 5 stars

Cool tool

Well, this is a very cool tool, I would only recommend some instruction to be placed with it! I thought I was on a roll only to find out I had it reversed! Oops, had to purchase another 80% to get it right!

James B.

Verified
February 5, 2024