Home AR-10/LR 308 AR-10 80% Lower Adjustable Universal Jig Kit

AR-10 80% Lower Adjustable Universal Jig Kit

Jig Options

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

Now that you have made the wise decision to purchase the new Juggernaut Tactical AR-10 80% Lower Receiver, you will need to finish the machining procedure. We have made that part of your personal rifle build project very easy with this high quality jig kit. All you need is a drill press or a mill.

  • 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-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 up to 25 lowers, or more
  • Made in the USA
  • Not guaranteed to fit all AR-10 lowers, due to differences in manufacturing

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 

For step-by-step video instructions on finishing your AR-10 80% Lower with our Jig Kit, 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

I love the products

Juggernaut knows what they are doing like they are out using their own product and always improving it for us. Keep up the good work and I’ll keep ordering from you guys and refuting my friends to your products for their builds!


June 18, 2024

5 out of 5 stars

AR-10 80% Lower Adjustable Universal Jig Kit

Easy to use and works well


February 27, 2024

5 out of 5 stars

80% 308 universal jig

Great jig. Does the job.

Andres A.

February 23, 2024

5 out of 5 stars

Great reusable jig

Works as it was intended . Great workmanship and tutorial.

Jon w.

February 14, 2024

5 out of 5 stars

Great Kit

Great kit and precise tolerances. Would buy again ..

John A.

February 11, 2024

5 out of 5 stars

2nd jig set

I like the jig so well I ordered the 2nd one just to have in case something ever happened to my 1st one. Easy to set up and use.

Allen B.

February 9, 2024