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80% Lower Receiver Jig for AR 15

List price: $109.00  
You save: $60.00 (55%)
6-pc Drill-Mill Tool Kit
In stock

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You can review the Drilling-Milling Procedure at this LINK

Viper Defense presents our Gen 3 AR 15 80% Lower Receiver Drill and Milling Jig which is machined from 6061-T651 Billet Aluminum. This Drill Fixture will allow you to finish the machining process for our Billet 80% Lower to include the FCG (Fire Control Group) Pocket, Hammer and Trigger Pin Holes and Safety Selector Hole.

Drill Fixture Contents

Our 5-piece 80% Lower Jig Kits include the following:

  • Left Hand and Right Hand Side Plates
  • Drilling Top Plate
  • Milling Top Plate
  • Trigger Slot Drill-Mill Top Plate

Jig Compatibility

Our Lower Jig is designed specifically to fit our Billet AR 15 80% Lowers. It will also work well on many other Billet AR 15 80% Lowers as well as Castings, AND many Forged Lowers even though most of them are NOT to "width spec" of 0.906" wide at the FCG.

One aspect of our Drill Jigs that is unique to our 80% Lower is that we have already milled the Upper Rear Pocket of the Lower so it is not a part of our Jigs.

Jig Finish

Our 80% Lower Receiver Jigs are now Anodized Blue (or soon will be) in the "Raw" state directly from our CNC machines and they are deburred only.

Availability / Shipping

Our Lower Jigs are in stock most days and can ship within 3-5 days.


  • (5) Pc Drill Jig Set Including Drilling Plate
  • 100% Mil-Spec 6061-T651 Billet Aluminum
  • Hard Anodized Blue per Mil-A-8625 Type III Class 2
  • Optional (6) Pc Tool Kit Available

How to Order

NO FFL Required!  You can order this 80% Lower Receiver Jig by adding it to your cart and purchasing securely over our website. Or e-mail us requesting that we contact you by phone to place an order that way. This 80% Lower Jig can be shipped to any persons over the age of 18 by USPS Priority Mail.