Polymer80 Jig Kit

Polymer80 Jig Kit

The most affordable way to buy and build an 80% lower or frame.

For the AR builder who wants the most cost-effective option for completing an 80% lower, we partnered with our friends at Polymer 80 to bring these incredibly  affordable lower-and-jig combo kits. Included with each kit is a quality, U.S.-made 80% lower receiver or 80% pistol frame, coupled with the necessary jig and the tool bits necessary for cutting and drilling the receiver/frame. Each blank is precisely molded from weapons-grade, nylon reinforced polymer and so is each jig. Cutting and drilling a polymer blank is arguably the easiest when compared to a forged or billet aluminum receiver, making this a perfect for the first-time builder getting their feet wet with amateur gunsmithing!

P80 Jigs for AR-15, LR-308, and GLOCK®-Compatible Builds

Polymer 80 runs the full line of 80% build options, with receiver and jib combo kits available for 5.56 NATO/.223 Remington and 300 Blackout AR-15s, the popular DPMS LR-308 (AR-10), and the new PF940 series of Glock®-compatible polymer pistol frames. Each jig is sized and automatically indexes each receiver blank, providing easy-to-use templates for cutting and drilling the receiver blank to completion.

Each 80% jig includes the required drill bits and end mill bits for completing every manufacturing step. Once cut and drilled, your finished lower receiver or frame will be 100% compatible with its corresponding platform's retail components. Factory and aftermarket lower parts kits, triggers, magazines, buffer assemblies, upper receivers, and slides are guaranteed to fit.

See visual instructions for completing your polymer AR-15 or LR-308 80% receiver with a jig.

What's Included

  • Polymer 80% lower / 80% frame
  • (2) Jig side plates with templates
  • (1) Set of drill and end mill bits
  • (1) set of written / visual instructions

Required and Recommended Tools

Some basic hand tools are required for completing your frame or receiver:

  • Tabletop vise
  • *Drill press
  • Hand files

*For AR-15 or LR-308 receivers, the fire control cavity can be completed with the included center-cut end mill bit and a drill press. For pistol builds, the 80% frame does not require a drill press and can instead be completed using a rounded machinist file and a pair of snips, or a Dremel. The included jig is disposable, but can be reused for a second receiver or frame if care is taken not to damage or mar the jig while cutting and drilling.

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.


DISCLAIMER: “GLOCK” is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. and GLOCK Ges.m.b.H. Neither 80 Percent Lowers, a/k/a Tactical Gear Heads, LLC nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H. The use of “GLOCK” on this page is merely to advertise the sale of GLOCK pistols, parts, or components. For additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products and parts visit www.glock.com.

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 80-lower.com, 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.

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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, New Jersey, New York, Pennsylvania, 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.