Upper Assemblies

Upper Assemblies

5.56-, 300 Blackout- and .223-chambered. MOA accuracy. Mil-Spec barrels.

Ready to pair up your finished 80% lower receiver with the perfect upper assembly? Our barreled AR uppers comprise top-tier components and barrels at a great price. We cut out the middleman and long supply chains, choosing instead to work directly with OEM manufacturers who use the highest-quality steels and aluminum alloys in all their parts. We carefully selected and configured each upper to provide MOA accuracy and utter reliability with any factory loads you send downrange.

Why Our Upper Assemblies?

It's simple: We use the "best stuff" and we make sure each upper's proven and test-tired before letting it go out the door.

  • All barrels are forged from MIL-B-11595 E steel (4150 or Chromoly Vanadium)
  • All stainless barrels forged from Crucible 416R steel, offering sub-MOA accuracy
  • All BCGs are M16 in profile with chrome lining and properly staked gas keys
  • All stripped upper receivers forged from mil-spec 7075 T6 aluminum
  • All buffer assemblies and lower parts kits are mil-spec in fit and finish
  • All barreled uppers are test-fired to ensure proper assembly

Pistol and Rifle Configurations

The 300 Blackout cartridge is wildly popular among enthusiasts who choose to stick with SBR and pistol configurations. After all, 300 BLK was designed to burn in a barrel shorter than 10". And still others appreciate the opportunity to employ a shorter weapon system in the AR platform, opting for a pistol brace over a conventional buttstock. We developed rifle and pistol uppers in all calibers just for this reason.

Have questions about pistol braces? Read our full guide here. It includes the ATF's opinion on shouldering one.

State Laws May Vary

Contrary to federal law, some states have either restricted or banned the sale, transfer, and ownership of 80% lowers, firearm blanks, and other gun parts. Because of these restrictions, we cannot ship our products to certain states. Please confirm whether your state is restricted on our Shipping & Return Policy before placing an order. We cannot fulfill orders to restricted states if placed.

 


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, 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.