Lower Parts & Kits

Lower Parts & Kits

A Lower Parts Kit is a vital component of any AR build. The ar15 lower parts kit includes the hammer, stainless trigger, magazine catch, takedown pins, detent springs and other vital accessories for your lower receiver. A lower parts kit is absolutely necessary to convert your 80% lower receiver from a piece of aluminum to a fully-functioning firearm quickly and cost-effectively.

Need help assembling? We wrote the ultimate guide on how to install the AR-15 lower parts kit.

Easy Assembly for First-Timers

All of the components in these ar15 lower parts kits come in individually labeled bags for quick recognition and easy installation. We guarantee 100% mil-spec fit and tolerances so you are not forced into buying a brand-specific, proprietary lower receiver. Regardless if this is your 1st or 20th AR build, you can order your lower parts kits with confidence from 80-Lower.com knowing that we guarantee our products, they are made in the USA and if you need anything, we are available to help you 24/7.

Lower Parts Kits Features

  • No FFL Required
  • 100% mil-spec
  • Individually-labeled bags
  • Stainless trigger & hammer assembly
  • Made in the USA

Your build awaits you.


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.