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Completing your black rifle or pistol without having to pay extra fees, or dealers' premiums, means investing in an AR-15 80% lower. This incomplete receiver blank isn't functional: It hasn't been completely drilled and can't accept a lower parts kit. To make your 80% receiver into a proper AR-15 lower, you'll need an AR15 jig, like the ones listed here.

How The AR 15 80% Jig Works

The AR 15 jig replicates the same milling and drilling procedures a commercial arms maker uses to fabricate an AR-15 stripped lower receiver. Using two side plates to secure the 80% lower, various top plates are then installed atop the side plates to act as cutting guides for completing the interior cavity of the receiver, making the correct space for installing a lower parts kit.

Once finished cutting the inner cavity with the provided bits, you'll drill the pin holes for the trigger, hammer, disconnector and safety lever. The side plates have pre-drilled guide holes to show where you to drill. The jig does most of the work, requiring you to only control the drill press or mini-mill you'll use with the jig.

Here's an in-depth guide showing how an AR-15 jig works.

AR-15 Jig Features and Specs:

  • Completes an 80% lower in 30 minutes to an hour
  • Requires basic hand tools (drill press or mill, vise)
  • Compatible with all 80% lowers we sell!
  • Includes required bits and tooling
  • Easy-to-follow instructions included!

State Laws May Vary

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.

Your AR-15 build awaits.


DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.