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31 of 31 Items
31 of 31 Items

Easy-to-assemble handgun lower parts kits and springs.

So, they're "technically" frame parts kits. But with 80% lowers all the rage, these kits and springs have begun being called handgun lower kits. Either way, we're happy to provide quality, OEM-grade parts and spring kits for your completed GLOCK-compatible 80% frames. These components are guaranteed to fit any Gen3 GLOCK, as well as our available polymer 80% G-comp frames. Hit the link above to grab one!

First-ever build? Read How to Build a Polymer80 Pistol here.

What's Included in Each Kit

Kits that include a barrel and slide are designed to be an "all-in-one" parts kit, made to pair up with your completed 80% frame or any Gen3 GLOCK frame. These kits allow you to finish assembly of your custom pistol, at which point you'll only need a magazine and ammo to hit the range.

MOA-Capable Barrel (optional)

We include 1:10-twist barrels with 11-degree target crowns in each Parts Kit. Barrels are available in carbon steel with a nitride QPQ treatment, or stainless steel.

GLOCK-Compatible Slide (optional)

Each slide is heat-treated to achieve a 41-44C hardness rating, and each features a nitride QPQ treatment for the best heat and corrosion protection against the elements and carbon fouling from spent powder and brass. Each slide sports OEM internal dimensions and specs, with Glock-compatible, OEM-style sight cuts.

Slide Options/Features

You may select a slide with rear serrations only, front and rear serrations, or a DLC-type slide with double serrations and a Trijicon RMR cut, which includes a cover plate.

OEM-Type Internals

In addition to selection an optional barrel and slide kit, you'll can opt for an internals-only parts kit which includes all internal slide parts, frame parts, and a Gen3 spring and guide rod. These internals include:

  • Connector
  • Slide Stop Release with Spring
  • Locking Block Pin
  • Magazine Release (May be extended depending on inventory)
  • Magazine Release Spring
  • Slide Lock
  • Slide Lock Spring
  • Trigger Housing Pin
  • Trigger Housing with Ejector
  • Trigger Pin
  • Trigger Spring
  • Trigger with Trigger Bar

Please note: None of these kits include a frame, locking block, or magazine. You may opt to purchase separately one of our GLOCK-compatible 80% frames here.

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

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.