AR15 Lower Parts Kit

AR15 Lower Parts Kit

An AR15 Lower Parts Kit comes with every spring, pin and a trigger assembly required for an AR15 build. Upon completing your 80% lower, you will then need to install an AR15 lower parts kit to convert the lower into a fully-functional lower receiver. The kits are separated into smaller, easily identifiable bags to make the installation even easier.

First-time builder? Read our full guide on picking an AR-15 trigger and how to troubleshoot the install.

All of of lower parts kits are 100% Mil-Spec and designed to fit with all of our 80% lowers and other manufacturer's Mil-Spec lower receivers as well. For your convenience, we have easy-to-follow instructional videos that guide you through each step of the installation process. Whether it’s your first build or 100th, we carry all of the internal components to take your AR-15 from parts and pieces to a fully-functional, custom rifle. With our lower parts kits, you can rest assured that you’ll have every part you’re going to need for build, at a fraction of the cost!

Benefits of AR15 Lower Parts Kits:

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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.