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  • Forged AR15 80% Lower Fire/Safe Marked (1-pack) Forged AR15 80% Lower Fire/Safe Marked (1-pack) Forged AR15 80% Lower Fire/Safe Marked (1-pack)

    80% Lower Fire/Safe Marked (1-pack)

    (1) Black Fire/Safe Marked AR15 Forged 80% Lower Receiver: For AR-15 builds (5.56/.223/300 BLK/6.5 Grendel) Color: Anodized Black Type III Hard Anodized 100% Mil-Spec Quantity: 1 Fire/Safe Marked: Yes Forged 7075-T6 Aluminum Broached Magwell 100% Made...

    $69.99
  • Premium 80% Lower Fire/Safe Marked Billet (1-pack) Premium 80% Lower Fire/Safe Marked Billet (1-pack) 2 Premium 80% Lower Fire/Safe Marked Billet (1-pack) 3 Premium 80% Lower Fire/Safe Marked Billet (1-pack) 4 Premium 80% Lower Fire/Safe Marked Billet (1-pack) 5

    Premium 80% Lower Fire/Safe Marked Billet (1-pack)

    The Premium 80% Lower Fire/Safe Marked Billet has been redesigned with you in mind. The Premium 80% Billet has been enhanced and now offers a threaded bolt catch release hole as well as a threaded rear takedown detent hole. These enhancements...

    $99.99
  • 80% Lower Fire/Safe Marked Billet Raw

    80% Lower Fire/Safe Marked Billet Raw

    (1) Raw 80% Lower Billet Receiver: Color: Raw - no anodization 100% Mil-Spec Quantity: 1 Fire/Safe Marked: Yes Oversized built-in trigger guard Rear takedown lug is pre-milled Billet 6061-T6 Aluminum 100% Made in the USA WARNING: Handling...

    $89.99
  • AR15 Billet Match Set - Stripped Upper & 80% Lower AR15 Billet Match Set - Stripped Upper & 80% Lower 2 AR15 Billet Match Set - Stripped Upper & 80% Lower 3 AR15 Billet Match Set - Stripped Upper & 80% Lower 4 AR15 Billet Match Set - Stripped Upper & 80% Lower 5

    AR15 Billet Match Set - Stripped Upper & 80% Lower

    When it comes to building just about anything, you're construct needs to have a strong foundation to start, and the AR15 is no exception. With both stripped upper and 80% lower receiver machined from 6061 T6 aluminum, you are guaranteed an ultralight yet...

    $159.99
  • Sale
    80% Lower (1-pack) - Blemished

    80% Lower (1-pack) - Blemished

    (1) Blemished Black 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. These blems may or may not be...

    Was: $69.99
    Now: $59.99
  • 80% Lower Patriot Pack 80% Lower Patriot Pack 2 80% Lower Patriot Pack 3 80% Lower Patriot Pack 4 80% Lower Patriot Pack 5

    80% Lower Patriot Pack

    Which of your planned builds should you start first? You have the AR-15, the staple of any gun owner's long gun collection. You have the .308, used for punching paper and slamming steel at long range. And you got the AR-9, the combat shooter used for...

    $314.99
  • 80% Lower Patriot Pack w/ Premium .308 Lower 2 80% Lower Patriot Pack w/ Premium .308 Lower 2 80% Lower Patriot Pack w/ Premium .308 Lower 3 80% Lower Patriot Pack w/ Premium .308 Lower 4 80% Lower Patriot Pack w/ Premium .308 Lower 6

    80% Lower Patriot Pack w/ Premium .308 Lower

    The AR platform has such an amazing variety that sometimes, it can be hard to choose a favorite. Well we're here to tell you, that you don't have to. Grab yourself out bundle of 100% made in USA, black anodized Lower receivers! (1) Black Fire/Safe Marked...

    $324.99
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The AR15 80 Lower is a crucial part of any AR15 build. An AR15 80 lower receiver provides the builder an opportunity to complete their own custom AR-15 rifle or pistol from the ground up, including by fabricating the firearm component (the stripped lower receiver) themselves.

What is an AR-15 80% Lower?

The AR-15 lower is the only part of the rifle or pistol considered a firearm. Even though it doesn't host a barrel and does not necessarily come with a trigger, hammer, safety, or other components (they're installed separately) it is still the component that is considered a firearm by the ATF. For this reason, all other parts of the AR-15 can be purchased piece by piece. One can fabricate an AR-15 80% lower, which is an unfinished lower receiver, to begin their build. Once fabricated, assemble your lower by purchasing an upper assembly and lower parts kit, or grab a complete AR build kit.

Have questions? This guide compares all 80% lowers and frames.

Follow our AR-15 Parts Guide to build your custom rifle.

Mil-Spec Lowers Compatible with Retail AR parts

There are countless AR-15 parts manufacturers on the market today. Like a stripped, finished lower receiver, these AR-15 80% lowers are mil-spec and “plug-and-play”. They're modular and work with standardized components, including typical upper receivers, triggers, magazines, buffer systems, and accessories. 

Ready to assemble? Here's how to install your lower parts kit.

State Laws May Vary

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).

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.