Home AR-15 AR-15 80% Lower Universal Jig Kit

AR-15 80% Lower Universal Jig Kit

$139.99
Jig Options
Quantity

If you already have our Universal Jig and want to purchase only the tooling packing, click here for our Universal Jig Tooling Package.

Now that you have made the wise decision to purchase the Juggernaut Tactical AR-15 80% Lower Receiver, you will need to finish the machining procedure. This high-quality 80% lower jig kit makes that part of your rifle build project easy. All you need is a drill press or a mill.

This 80% lower jig kit can be used on both forged and billet AR-15 80% lower receivers using the new indexing technique, which utilizes the buffer tube mount to center the receiver (not the sides).

  • Can be used on both forged and billet AR-15 80% lower receivers
  • New indexing technique uses the buffer tube mount to center the receiver (not the sides)
  • CNC-machined from solid aerospace T6 heat-treated 6061 billet aluminum
  • Laser-etched with 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 JT-15 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 up to 25 lowers, or more
  • Made in the USA

Tooling package comes with:

  • 1 ea. 0.484" Cobalt Drill
  • 1 ea. 0.375" Cobalt Drill
  • 1 ea. 0.156" Cobalt Drill
  • 2 ea. 0.125" Cobalt Drill
  • 1 ea. 3/8" Carbide Endmill
  • 1 ea. 1/4" Carbide Endmill

Click here for step-by-step video instructions on finishing your AR-15 80% Lower with our 80% lower jig kit.

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

Quality product...5 Stars..

Well thought out design..user friendly

Andrew L.

Verified
September 19, 2024

5 out of 5 stars

Great product.

Showed up little late but I ain't complaining by all means. Good stuff will be doing business again.

S.K.

Verified
September 18, 2024

5 out of 5 stars

Excellent product If..

I found that it did not fit a lower from another company but did fit perfectly an 80lowers that Juggernaut Tactical has available, being my first to do it came out terrible but that came from lack of experience NOT any fault of the jig. In the end I got a serialized stripped lower for my build. Will try on another 80lower someday and skip no steps. If you have a good drill press that you can set the speeds easier than mine and a good depth adjustment on it then follow the video they link you and this jig will then be a piece of cake to use.

R.R.

Verified
September 17, 2024

5 out of 5 stars

Simple

Great product, easy to use and turns out a good lower receiver. I have already turned out several and all parts appear to be wearing well.

Kenneth B.

Verified
September 4, 2024

5 out of 5 stars

It works!

Easy to use and straight forward! Take your time(and cutting oil), that's all it takes.

Douglas D.

Verified
August 30, 2024

5 out of 5 stars

Great jig

I am new to the building seen. At this point I have used 2 different jigs and there is no comparison that the juggernaut jig is the best, and so easy to use. I definitely recommend the product.

Anonymous

Verified
June 11, 2024

5 out of 5 stars

Great jig kit

This lower jig kit is so easy to use I have to watch what I’m doing though because u can mess any of the top plates up I have done 40 or so lowers with this jig and could do a 5 or 6 more with it Really a great jig for the price!!!!

Ellis

Verified
May 20, 2024

5 out of 5 stars

Great Jig

Great jig, easy to use. Fun and therapeutic! Do it!!

Brandon D.

Verified
May 3, 2024

5 out of 5 stars

Fit

It doesn't fit side to side like it should . If you over tighten the rear bolt it wants to taper out at the other end. I had to be very careful not to bend it. Other wise it worked pretty good. The bottom could use some spacers to help from over tightening. The hole locations for the hammer, trigger and safety were very accurate. I know that Lower widths can vary .010 - .020. I think the side plates should be able to handle some spacers at a particular width. Anodized finish was nice and thick and helped to protect hole accuracy. I'm a tool and die / tool maker and I had almost made my own. Bought yours instead

Philip W.

Verified
May 1, 2024

5 out of 5 stars

Great product

Well made. Exact measurements

Ron P.

Verified
April 22, 2024

5 out of 5 stars

Ar kit

Easy to set up and use

Robert M.

Verified
March 21, 2024

5 out of 5 stars

AR-15 80% Lower Universal Jig Kit

I love it, I was able to finish the JTE15 billet lowers with ease. (Jig will not fit 80% arms or 5D tactical billet lowers)

Micah N.

Verified
March 17, 2024

5 out of 5 stars

Universal Jig

Easy to understand and use. Was able to do 5 lowers without wearing any of the top plates.

Luther B.

Verified
March 16, 2024

5 out of 5 stars

superb product

very nice product very user friendly and of good quality. had absolutely zero problems using this product. keep up the good work

Sean M.

Verified
March 8, 2024

5 out of 5 stars

Great Product!

Jig kit is simple to use and made of good quality materials.

Dan S.

Verified
February 15, 2024

5 out of 5 stars

Well built, easy to use!!!

The most important thing is to watch the video on their website because it breaks the process down step by step. If you do that then there are no problems ( unless you have no machining experience) but even if that is the case just pay extra attention to the video. You will need calipers as well.

Kris S.

Verified
February 14, 2024

5 out of 5 stars

Ar 15 milling jig

Works perfectly ,it may help if the drills had a hexagon shank,other than that ,its nearly fool proof, glad I got it!!!

James W.

Verified
February 10, 2024

5 out of 5 stars

universal AR-15 Lower Universal Jig Kit

This lower jig works better than expected. i would recommend this lower jig to anyone that is needing one for a 80% lower

james c.

Verified
February 9, 2024

5 out of 5 stars

love it

It was easy to use, I watched the video a few times to make sure I did everything right, and it came out beautiful.

christopher d.

Verified
February 8, 2024

4 out of 5 stars

Review

I really like this jig and enjoy using it. It's pretty straight forward to use for a first time builder like myself. I think they should update there instructions because it gave me a link to watch a video on you tube that wasn't there and had to email them to find out how to do the process of milling out the lower.

J.S.

Verified
February 8, 2024

5 out of 5 stars

It worked great

The jig kit and tools seem to be good quality and made finishing my lower quick and easy.

Christopher C.

Verified
February 6, 2024