An 80 percent lower (80% lower) is a partially machined lower receiver for builders who want to assemble their own AR-platform rifle or pistol. We stock forged 7075-T6 and billet 6061-T6 lowers for AR-15, AR-10/.308 and AR-9, in raw or anodized finishes, plus blemished lowers at a discount. State and local laws vary; check our shipping restrictions before you order.
Forged or billet? Read: Billet vs. Forged Receivers →
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Our famous, original forged 80% lower. It’s the lower trusted by tens of thousands of AR builders. Proudly forged, cut, and anodized in the U.S.A., this 80 percent lower is the key to building your custom AR-15 truly from scratch. This receiver blank features a matte black anodized finish that perfectly matches any upper receiver….
Our Premium Billet 80% Lower has been redesigned with easier assembly in mind. This receiver has been enhanced with a threaded bolt catch release hole. No more roll pins! This enhancement allows for a quicker, simpler install of your lower parts kit with fewer tools required. 100% mil-spec fitment ensures this lower works with all…
Enjoy the classic black look with our .308 80% lower receiver. Made from billet 6061-T6 Aluminum, these are incredibly rugged lowers that are made to last and are anodized black to help protect against corrosion. They are NOT marked with Fire/Safe engraving. Find a lower parts kit to complete your LR-308 80% lower by clicking…
Figure out the look of your next .308 build with our .308 80% raw lower receiver. Made from billet 6061-T6 Aluminum, these are incredibly rugged lowers that are made to last and are unfinished to allow for the durakote, cerakote, or other finish of your choice. This lower does not come marked with Fire/Safe engraving….
Our new and improved billet AR-9 80% lower is here! Featuring an updated design with better aesthetics, a new magazine catch and ejector fasteners, our second generation AR-9 80% lower is better than ever. Made from quality billet 6061-T6 aluminum. Compatible with standard AR-15 lower parts kit components, and all 9mm AR uppers. ONLY compatible…
Our new billet AR-9 80% lower receiver, now available uncoated. Featuring an updated design with better aesthetics, a new magazine catch and ejector fasteners, our second generation AR-9 80% lower is better than ever. We’ve left this lower raw and unfinished, with no coating, so you can apply your own custom finish. Made from quality…
Blemished Billet Premium 80% Lower This receiver is blemished. Surface marks will vary. The lower receiver is fully functional once fabricated, just like any unblemished 80% lower. NOTE: BLEMISHED LOWERS ARE FINAL SALES AND NON-REFUNDABLE. Blemish Billet 80% lower Specifications: For AR-15 builds (5.56/.223/300 BLK/6.5 Grendel) Type III Hard Anodized Billet Color: Anodized Black 100% Mil-Spec Quantity:…
Blemished .308 80% Lower: Small scuffs, 100% performance. Save a couple bucks on your 80% AR-10 build! These blemished .308 receiver blanks feature small surface blemishes, which may include slight scratches or scuffs — but they’re perfectly functional and just as reliable as any other receiver. Combine with an LR-308 / AR-10 rifle kit to…
Blemished AR9 80% Lower Receiver: This receiver is blemished. Marks will vary. The lower receiver is fully functional once fabricated, just like any unblemished 80% lower. This is a NON-REFUNDABLE product. Blemished AR-9 80% Lower Specifications Compatibility: 9mm Parabellum Construction: Billet 6061-T6 Aluminum Finish: Type III Hardcoat Anodizing Color: Matte Black Fitment: 100% Mil-Spec Fire/Safe Engraving: Yes Features: Integrated trigger guard,…
Build all three ARs with one 80% lower combo kit. Originally chambered in 5.56 NATO and .223 Remington, the AR has evolved to chamber different calibers, with upper and lower receivers redesigned to include the .308 AR-10, and the 9mm AR9. It can be hard to choose a favorite. So, don’t settle — just grab…
Our original forged 80% lower, now available uncoated. Our mil-spec forged lower’s now available in raw aluminum, allowing you to more easily apply a custom camoflauge paint job, or other custom coating of your choice. Beyond its raw finish, this forged 80% lower is identical to our mil-spec, forged, anodized units. 80% Lower Specifications Compatibility:…
Our updated billet AR-15 billet 80% lower with a quality lower build kit. Grab a quality, mil-spec lower assembly kit built to pair with your new 80% lower and save! This kit contains all components required to assemble the lower half of your custom AR-15 build in one kit. Just finish the lower, put it…
No AR-15 build is complete without a butt stock assembly – and this one comes with all you need: Black FIRE/SAFE engraved 80% lower, lower parts kit, butt stock, buffer tube assembly. One (1) Black FIRE/SAFE 80% Lower Receiver: FIRE/SAFE Engraved Color: Anodized Mil-Spec Black Quantity:1 Forged 7075-T6 Aluminum Broached Magwell 100% Made in the USA Sold…
Got your mind set on building your own AR10 Rifle? Then check out this lower assembly that features a .308 80% lower crafted from 7075-T6 aluminum billet and anodized black. It also includes a lower parts kit that has been laser cut and polished for a smooth trigger pull as well as a 6-position buffer…
Got your mind set on building your own AR10 Rifle? Then check out this lower build kit that features a .308 80% lower crafted from 7075-T6 aluminum billet and anodized black. It also includes a lower parts kit that has been laser cut and polished for a smooth trigger pull. Billet .308 80% Lower Receiver:…
Start your next AR build by killing two birds with one stone. Get your 80% lower and your lower parts kit all in the same place in one fell swoop. This bundle includes both. You get a 7075 T6 forged aluminum 80% lower and a mil-spec lower parts kit that’s had its interacting surfaces polished…
Our new and improved billet AR-9 80% lower, with a quality lower parts kit! Grab our new and improved AR-9 80% lower with a mil-spec lower parts kit thrown in, and save on this bundle! Featuring an updated design with better aesthetics, a new magazine catch and ejector fasteners, our second generation AR-9 80% lower…
This is a replacement ejector plate and magazine release kit for our AR9 80% Billet Lower Receiver. Ejector Plate Specifications: Made from 17-4 Stainless Steel hardened to RC42 2 cap screws included Mag Release Specifications: Billet aluminum magazine catch Dowel pin, spring and set screw included Lower receiver not included.
This is a replacement ejector for our AR9 80% Billet Lower Receiver. Features: Made from 17-4 Stainless Steel hardened to RC42 Includes 2 cap screws Lower receiver not included.
This is a replacement magazine release kit for our AR9 80% Billet Lower Receiver. Features: Billet aluminum magazine catch Dowel pin, spring and set screw included Lower receiver not included.
Our updated AR-15 billet 80% lower now paired with a quality lower parts kit. Grab a quality, mil-spec LPK to pair with your new 80% lower and save! We’ve bundled a quality parts kit with our new billet lower to offer a convenient 2-for-1 package that makes your custom AR-15 build easier and more affordable….
Blemished 80% Lower: Minor scratches, perfectly functional. Sometimes, receivers get a ding or scratch — it’s just part of forging gun parts. We discount these cosmetically blemished 80% lowers to reflect these flaws. Each lower is 100% functional and as strong as any other receiver. This receiver blank features a matte black anodized finish that…
The O.G. forged AR-15 80% lower, now skeletonized. Pressed and cut from 7075-T6 aluminum, this skeletonized 80% lower is the perfect solution for building an ultra-light or custom AR-15 different from all the rest. The cut-out mag well pairs perfectly with any windowed or translucent magazine while retaining the strength and reliability you get with…
Our new and improved billet AR-9 80% lower, in a full lower build kit! Our new and improved AR-9 80% lower now comes available with a full lower build kit! Includes an LPK, 9mm buffer kit, and SBA-3 brace! Featuring an updated design with better aesthetics, a new magazine catch and ejector fasteners, our second…
In the market for an 80 percent lower? The 80 lower receiver is a vital component for any do-it-yourself AR-15 AR9, or AR 10/308 build. Every 80 percent lower we sell is proudly made in the U.S.A. from quality billet aluminum (6061-T6), mil-spec forged aluminum (7075-T6), or weapons-grade polymer.
There are plenty of benefits of using an 80% lower to build your AR-15, AR-10, or AR9:
Privacy. Under ATF’s 2022 frame or receiver rule, which the Supreme Court upheld in Bondi v. VanDerStok in March 2025, a receiver blank that hasn’t reached the point where it can be readily completed isn’t a firearm, so it ships to you without a serial number or FFL transfer.*
*Local and state laws vary. Some states require serialization of all firearms, and some states have banned 80% lowers.
Cost. By buying an unfinished receiver, you save on manufacturing costs and skip the “brand tax” most gun makers charge, plus the FFL transfer fee.
Customization. By starting with a blank receiver, you get to decide what parts you install to finish your custom AR build, and you avoid paying extra for parts you don’t want.
Compatibility. Our 80% lowers are made in the U.S.A. Lowers are forged and milled to tight tolerances, ensuring a perfect fit and finish. Lowers are MIL-SPEC and compatible with all off-the-shelf AR-15 parts. Once you finish your lower, it will be identical in form and function to the lower receivers found on any AR-type rifle available at any gun store.
Read our Complete Guide on How to Build an AR-15
The ATF calls these parts “receiver blanks.” Under ATF’s 2022 frame or receiver rule, which the Supreme Court upheld in Bondi v. VanDerStok in March 2025, a receiver blank that hasn’t reached the point where it can be readily completed isn’t a firearm. A blank that has reached that point, or one sold together with a jig or tooling to finish it, is treated as a firearm. Our 80% lowers are sold on their own, without jigs or tooling. Once you complete one, it’s a firearm, and thousands of shooters have built reliable and accurate AR-type rifles and pistols with our units.
Cutting and drilling the lower at home with hand tools — something you, the builder, will do yourself — turns an 80 percent lower into a firearm. Whether it’s an AR-15 or AR-10, thousands of shooters have built reliable and accurate AR-type rifles and pistols with our units.
Read this 80% Lower FAQ to learn more.
There are several types of 80% lower receivers available for the AR platform. Depending on which 80 lower you pick, you can build an AR-15, AR9, or AR-10 chambered in the following calibers:
The AR-15 80 lower functions just like any stripped lower receiver you’d buy from an FFL or gun store. These lowers are available in billet (6061-T6) and forged (7075T6) aluminum, and polymer. With one of these lowers, you can build an AR chambered in:
The AR-10 80 lower is based on the DPMS .308 AR platform, which currently acts as the universal standard for all .308-chambered AR-type rifles. Although technically different from the original ArmaLite AR-10, the DPMS .308 is still referred to as the AR-10 platform, and it is practically identical in form and function. It can chamber the following cartridges:
The AR9 80 lower is based largely on the AR-15 lower. It uses most of the same components, including the same grip, trigger, hammer, safety, and disconnector, as well as the same buffer system and buffer tube. But it uses a custom magazine well and ejector to handle the 9mm cartridge.
Not sure which lower to pick? This guide compares all 80% lowers.
Under federal law, generally yes. Under ATF’s 2022 frame or receiver rule, which the Supreme Court upheld in Bondi v. VanDerStok in March 2025, a receiver blank that hasn’t reached the point where it can be readily completed isn’t a firearm. Some states and cities restrict or ban 80% lowers, and some, like California, require serialization and a background check. Check your state and local laws and our Shipping & Returns page before ordering.
Not under federal law. Our 80% lowers are sold on their own, without jigs or tooling. State laws vary, and some states require a background check or ban sales outright.
We can’t ship 80% lowers to states that restrict them, and orders from those states are canceled. The current list is on our Shipping & Returns page.
No. Our 80 percent lowers are sold on their own, without jigs or tooling. Under the 2022 rule, a receiver blank sold together with a jig or tooling to finish it is treated as a firearm.
A stripped lower receiver is finished. It’s a firearm with a serial number, and you buy it through an FFL with a background check. An 80 lower receiver is an unfinished blank that isn’t machined to accept the fire control parts. Under federal law it isn’t a firearm until it reaches the point where it can be readily completed. Once completed, it works like any stripped lower with standard parts. What is an 80 percent lower?
Forged lowers are pressed from 7075-T6 aluminum, the same material and process as most mil-spec lowers. Billet lowers are machined from a solid block of 6061-T6, which allows extras like the threaded bolt catch and takedown detent holes on our Premium billet lower. Both use standard parts. Billet vs. Forged Receivers
It’s a lower with cosmetic marks only, sold at a discount. It works the same and is just as strong as our standard lowers. Shop blemished lowers.
Yes. Our AR-15 80 percent lowers are mil-spec, so once completed they take standard uppers, lower parts kits, buffer tubes and stocks. AR-10 and AR-9 lowers need their own uppers (see below).
Match it to your caliber:
Our .308 80 percent lowers are DPMS Gen 1 pattern (LR-308), the most common commercial .308 AR pattern. They fit DPMS Gen 1 .308 uppers, including the uppers and kits we sell, but not uppers built for the original ArmaLite AR-10 pattern. We recommend our LR-308/AR-10 lower parts kit, which includes the threaded bolt catch pin.
Not by themselves. Our AR-9 lowers don’t have the internal linkage for last-round bolt hold-open (LRBHO). If you want the bolt to lock back on an empty magazine, use an AR-9 upper with integrated LRBHO, and check your upper’s specs before ordering.
Some states have banned 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).
Execute the right to bear arms today. Your build awaits.
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.
