Barreled uppers for custom AR-15 builds.
Regardless of platform, each of our AR-15 rifle upper assemblies is meticulously crafted and configured to be mil-spec and compatible with all components for its caliber. Whether piecing together a custom AR-15 in 5.56/.223, 300 Blackout, or 6.5 Grendel, you can be confident behind the trigger knowing you're getting a unit built for dependability and accuracy.
All rifle uppers are assembled and test-fired to ensure reliability before shipping. Unless selecting an A2-style upper with classic FSB, all uppers utilize a low-profile gas block to ensure compatibility with any free-float handguard. To purchase all components required for assembling a working rifle, pair your upper with a lower parts kit assembly (includes mil-spec 80% lower) and jig.
Can't decide between carbon and stainless? Read the Guide to AR-15 Barrels.
Some states have banned the sale of upper assemblies, receivers, 80% lowers, and certain firearm parts, or have otherwise restricted the sale and ownership of products we sell. So, be sure to check your local and state laws. We can’t ship our products to certain states. Please check our Shipping & Return Policy before placing an order (see restrictions).
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.
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.