Showing all 17 results
So you’re interested in building your own AR-15, and you’ve even gone so far as to build the whole bottom half. But you can’t quite see yourself ready to undertake putting together the top half. Well, how are you with a screwdriver and installing sights? Because if you can do that, we’ll build the whole…
Side-Charging .223 Wylde Upper Assembly with 16″ Parkerized Barrel and 15″ M-LOK Handguard Want a ready-to-run side-charging AR-15 upper without sourcing and assembling every part yourself? This one arrives fully built. At its core is a 16″ M4-profile barrel in 4150 chrome moly vanadium steel with a 1:7 twist and a .223 Wylde chamber. The…
Optimized for subsonic accuracy. Featuring a 7.5″ heavy barrel with a 1:8 twist rate, this 300 Blackout AR-15 upper provides the perfect combination of parts and specifications to ensure all subsonic loads are stabilized for maximum accuracy. Included is an upgraded, custom billet upper with a side-charging bolt carrier group for improved ergonomics. What’s Included…
Please note: We strive to provide the most accurate photographs of our product wherever possible. Due to availability limitations and supply chain constraints, slight variations of the handguard of this upper assembly may occur in the aesthetics of the skeletonizations in between the M-LOK sections. For the longrange shooter who demands a do-it-all AR with…
So half-way done with building your own AR-15. You’ve gotten as far as building the bottom half, and you’re now ready to tackle your upper assembly. Think of it this way: you’re not half-way done, you’re damn near completely done. Because if you can turn a screwdriver, allen wrench, or socket wrench to install backup…
Precision meets value in this stainless steel 5.56 NATO complete upper. This AR-15 Complete Upper is a high-value, “ready-to-run” solution for your next AR-15 build or upgrade. Chambered in 5.56 NATO, this assembly features a 16-inch M4 contour barrel crafted from 416R Stainless Steel, offering a sleek look with enhanced corrosion resistance and precision. The…
Engineered for precision and power, this 7.62×39 AR-15 upper combines a heavy barrel with the 7.62×39 cartridge, offering superior performance long missing from other rifles. Built around a 16″, 1:10-twist, heavy barrel housed within a custom free-float M-LOK handguard, this upper offers tighter shot groups and improved heat resistance during rapid fire. This upper features…
Tungsten Cerakote 7.62×39 AR-15 Upper with 16″ Heavy Barrel and 15″ Talon M-LOK Handguard Want to shoot 7.62×39 without switching platforms? This upper puts the classic AK cartridge on your AR-15 lower, and its 16″ heavy-profile barrel stands up to long strings of fire while keeping your groups consistent. The handguard and forged upper receiver…
Stretch the 9mm cartridge to its limits with this 16″ 9mm upper. This rifle-length barrel maximizes muzzle velocity and spin rate to afford hole-punch accuracy beyond 100 meters. Paired with a monolithic BCG and heavy-duty 9mm buffer, this upper’s even easier to charge and it absorbs felt recoil better than any other 9mm platform on…
The most compact AR upper on the market. Period. Introducing the AR-15 Complete Bufferless 9mm Pistol-Length Upper Assembly. Crafted to precision, this upper boasts a 5″ M4 barrel finished with durable parkerization, featuring a 1:10 twist rate and a reliable blowback gas system. Includes Sealed, Bufferless End Plate This bufferless 9mm upper includes a unique,…
Stretch the 9mm cartridge to its limits with this 16″ 9mm upper. This rifle-length barrel maximize muzzle velocity and spin rate to afford hole-punch accuracy beyond 100 meters. Paired with a monolithic BCG and heavy-duty 9mm buffer, this upper’s even easier to charge and it absorbs felt recoil better than any other 9mm platform on…
Want an LR-308 that looks as good as it performs? Want to develop that “extension of yourself” level of familiarity that only building it yourself could grant you? Get your zen on with this LR-308 upper assembly, with a black nitride barrel that’s been given straight fluting to show that attention-getting stainless steel underneath. This…
Please note: We strive to provide the most accurate photographs of our product wherever possible. Due to availability limitations and supply chain constraints, slight variations of the handguard of this upper assembly may occur in the aesthetics of the skeletonizations in between the M-LOK sections. If you’re a hunter, you can appreciate the need for a somewhat…
Build your LR-308 rifle with this upper assembly, and then really stretch out with your shots fired and go the distance. This build kit comes with a 20″ match barrel made of 416R stainless steel, so you can count on it lasting the entire life of your LR-308. A custom, free-float M-LOK handguard with low-profile…
Ergonomic performance meets compact power in this side-charging 5.56 NATO complete upper. This AR-15 Complete Upper is a high-value, “ready-to-run” solution for your next AR pistol or short-barreled rifle (SBR) build. Chambered in 5.56 NATO, this assembly features a 10.5-inch M4 contour barrel crafted from heavy-duty 4150 Chrome Moly Vanadium steel, offering exceptional longevity and…
Some people love classic things. Some of those classic-loving people love classic firearms. You know the type. They can list every good thing about the 1911 in alphabetical order, or tell ya all about how the M-16 used to “jam like a sumbitch.” They might even have personal experience on the matter. If you’re the…
The perfect balance of power and size. This AR-9 upper’s 7.5″ barrel effectively maximizes 9mm’s muzzle velocity, while keeping an overall short and compact profile. It’s the perfect upper for building a range toy that can strike steel at 100+ yards, while offering the stout profile you want in a personal defense weapon. Coupled with…
Forget the overpriced AR at the big-box gun store. That rifle doesn’t have the specs and parts you want, anyway. Build or upgrade your AR with a custom, ready-to-fire upper assembly instead. We spec each upper with the highest quality barrels and 100% U.S.-made parts.
Uppers are available in the most popular calibers: 5.56 NATO, .223 Wylde, 300 Blackout, 7.62×39, .308 Winchester and 9mm. Side-charging uppers and custom Cerakoted uppers available!
Not all upper are made equal. Some are, in fact, wildly overpriced (looking at you, brand taxes). Others are just cheap and inaccurate. Our uppers are made from high-quality components, but we don’t bother with flashy branding or marketing. We let our customers’ own reviews speak for themselves.
Our uppers offer S-tier performance without the price. Every upper is carefully pieced together by enthusiasts who’ve been building custom ARs for nearly two decades.
We hand-pick all our components to ensure every upper provides optimal functionality for different AR builds. Whether you’re putting together a 24″ long rifle, a 16″ 5.56 or .223 plinker, or a short-range, subsonic SBR in 300 BLK or 9mm, you’ll find an upper with the right gas system, handguard, barrel, twist rate, and other parts to get the job done.
All carbon steel barrels are forged from MIL-B-11595 E steel (mil-spec 4150 steel)
All stainless steel barrels forged from Crucible 416R steel, offering sub-MOA accuracy
Can’t decide between a carbon and stainless barrel? Read this! 4150 vs. 416R Stainless: Which Barrel & When?
Every barreled upper assembly includes:
Exceptions:
Some states ban the sale of barreled AR-15 upper assemblies. See our Shipping & Returns page for the states we can’t ship barreled uppers to.
Please see our Shipping & Return Policy for more information. You will not be able to add an upper assembly to your cart and complete your order if you live in a restricted state.
Got questions before ordering an upper? We’ve got you covered! Here are the most common questions we get:
A: No. The AR platform’s stripped lower receiver is the serialized “firearm” component of the weapon. Upper assemblies are not considered firearms under federal law, and do not require shipment to, or transfer from, an FFL or gun dealer.
A: We ship all orders with lightning speed from our Indiana warehouse! You should expect to receive your order within 5 to 7 business days. Contact us for a more specific and accurate shipping time based on your location.
A: Yes, but importantly, some side-charging uppers require a longer buffer. This prevents the BCG from over-traveling, which can result in the charging handle striking the rear of the upper receiver’s ejection port and causing damage. When it’s required, a longer buffer is included with your order.
A: Yes. All side-charging upper receivers and BCGs are compatible with standard rear charging handles. Simply unbolt the side-charging handle from the BCG, separate the upper and lower receivers via the rear takedown pin, and install your rear-facing charging handle.
A: Rifle uppers come with barrels measuring at least 16″ in length. This is the minimum legal barrel length any rifle must have, otherwise, it would be classified as a short-barreled rifle. Pistol uppers have barrels measuring less than 16″ in length, and must only be installed on a pistol receiver assembly not equipped with any type of buttstock or device that makes it intended to be fired from the shoulder.
A pistol upper can be used to legally build a short-barreled rifle if the lower receiver is first registered with the ATF as an SBR under the National Firearms Act. This guide covers the steps required to register an SBR.
A: 5.56 NATO uppers chamber mil-spec rounds. 223 Remington uppers chamber the commercial equivalent of 5.56 NATO. The .223 Wylde chamber can safely and more accurately chamber both rounds, providing a convenient way to use a wide range of ammo and enjoy better performance at the range.
Want to know more? Read this! What is .223 Wylde?
A: All our AR-15, AR-9, and AR-45 uppers are designed with “mil-spec” fitment. That means they’ll fit any standard, mil-spec, forged lower receiver, or any billet lower receiver advertised as having mil-spec compatibility.
Our .308 uppers are made to fit the more common and commercially available DPMS pattern of lower receivers. They will not fit the original ArmaLite AR-10 lower receiver pattern, which has become a far less common pattern in today’s AR market.
Want to know more? Read this! The AR-10 vs. LR-308: What’s Different?
Our uppers are also compatible with their corresponding 80% lowers by caliber.
A: All upper assemblies come with a Limited Lifetime Warranty covering any manufacturing defects. If, during normal operation, your upper or any of its components become damaged or fail due to a manufacturing defect, contact us for a warrantied exchange.
Note: Normal wear-and-tear is not covered by this Warranty. Examples of normal wear-and-tear include, but are not limited to, barrel throat erosion, rifling wear, corrosion of components from fouling, thinning or loss of protective coatings from normal use, and/or replacement of wear components due to malfunctions after high round counts, such as bolt gas rings or extractors.
Your custom upper 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.
