Full Size Pistol Kit

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Full Size Pistol Kit

Each full-size 80% pistol kit is made to be compatible the most popular handgun platforms on the market: Configure a custom 1911, GLOCK-compatible pistol, or Sig P320 handgun in less than a day with one of these complete kits. Regardless of chosen platform, your completed and assembled full-size pistol will be work with all its corresponding "retail" (factory and aftermarket) platform's components!

What's Included With Your Pistol Kit

Regardless of platform (1911, Sig Sauer, or GLOCK-compatible) each full-size pistol kit includes the following components:

  • 80% pistol frame
  • Barrel w/ rod/spring
  • Slide assembly
  • Trigger assembly
  • (1) magazine
  • Iron sights

Polymer80 Full-Size Kits also include the required finishing jig, drill bits, and instructions for fabricating the included 80% frame. That means you'll have all the parts required for completing your pistol and taking it to the range.

The P320 Full-Size Kits include the finishing jig and drill bits for completing the 80% fire control unit (FCU), too. Instructions are also provided with easy-to-follow video tutorials to guide you through the process.

All Full-Size 1911 Kits require the Stealth Arms Phantom 80% Jig to cut and drill the included frame. The Stealth Arms jig includes drill bits and the cutting equipment for completing the frame, with instructions included.

Completing Your 80% Frame

Regardless of your chosen platform, completing your 80% frame generally requires the same procedures: Using some drill bits, you'll drill pin holes for the parts kit, trigger, and various components you need to install on the frame. You'll also need to cut grooves or bend metal tabs into the frame (or FCU for the P320) to allow for the installation of the barrel and slide. These steps require no specialty tools and little to no experience.

Pistol Builder's FAQ

Is building a handgun at home legal?

Under federal law, yes. The ATF says you do not need a license to build a gun at home for personal use. No FFL is required, nor is a background check or paperwork.

Are these kits legal to buy and own?

Under federal law, yes. The included components in each full-size pistol kit are not legally considered firearms under federal law, including the 80% frame. The frame is normally the component of a gun that's considered a firearm and requires a serial number, but these units are not functional. The frames in these haven't yet been fabricated by you, the individual builder, so they aren't considered firearms until you begin fabricating them.

What about state laws?

Certain states have restricted or outright banned gun-making kits like these. State and local laws and ordinances also change frequently, so you must first check our Shipping & Returns Policy before ordering to determine whether we can ship to your state. Before buying or building a firearm, consult with an attorney or legal counsel if you have questions. Some states have banned 80% lowers and certain firearm parts, or have otherwise restricted the sale and ownership of products we sell.

What tools do I need to finish my 80% frame?

All full-size 80% frames are designed to be cut and drilled with basic tools you may already own: A vise is required for securing the frame and jig, and you'll need an electric hand drill to make the pin holes for your parts installation. Polymer frames can be completed with a Dremel and cutting wheel or snips, plus some round files for final fitment. The P320 80% chassis requires a Dremel, hammer, and hand drill or drill press, and the 1911 kits require only a vise and hand drill or drill press.The 1911 jig includes all other tools.


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, 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.