Pre-built uppers, custom barrels, upgraded handguards, muzzle devices and more.
Grab everything you need to build or upgrade your first or next AR-15 upper! We've worked closely with top makers like M-LOK, Aero Precision, GLOCK, and others to provide high-speed upgrades and OEM parts required to finishing or tricking out your custom AR rifle or pistol.
All upper assemblies are assembled, torqued and function-tested to ensure your AR's ready to send rounds downrange once you tap down those pivot pins. Each upper assembly includes a mil-spec, M16-profile bolt carrier group and charging handle. All you need is your finished lower assembly!
Assemble a custom upper with our how-to guide.
If you're building your assembly from scratch, your AR-type upper (and generally all upper assemblies, regardless of caliber) require the following upper parts. Our prebuilt upper assemblies include all components listed below:
Even if you just bought or built your AR-15, there's plenty of opportunity to upgrade. Make reloads quicker and easy -- especially if you're running a glass optic -- by investing in an oversized charging handle. Want tighter shot groups with less recoil? It takes a few minutes to swap out and torque down a new compensator, like the popular Midwest Industries Muzzle Brake. Piecing together an upgraded mil-spec rifle? Check out our M4-profile barrels, forged from 4150 CMV.
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% 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.
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.