80% AR15 Lower Receiver - 7075 Raw

$42.00 $38.50
(You save $3.50)
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Made in the USA


Q - What is the difference between an AAO 80% lower and others?

A - Safe / Fire laser etched into the AAO Lower.  

   - ALL AAO Lowers have a built in lower to upper adjustment feature that can be used to take up the slack/space between the upper/lower fitment (via an included allen head screw).  

   - You can quickly test your upper to lower fitment with the AAO Lower before you mill, this is due to a small pocket milled into the rear takedown pin area.

   - High quality and best in class precision machining for a good price.  We are real gun guys and we fire what we make, so it has to be good.

Q - What material do you use?

A - All of our lowers are machined form: 7075-T6 Aluminum

Q - What LRPK (LPK) will work?

A - We recommend the AAO MFG LRPK, however any standard mil-spec LRPK will work.

Q - What does RAW or "IN THE WHITE" mean?

A - Raw means "unfinished" or "in the white", the unit has been fully deburred and is ready for you to finish.  

Q  - What information do you need if I choose CA Compliance Engraving via the drop down menus?

A - Leave your information in the notes section of the checkout page.

  • CA Compliance list information as follows: Your Name, Your City, State, Multi Cal, Your Serial# 
  • If ordering multiples lowers list your serial numbers as:  0001:0006 (serial number 0001 through 0006)

Q - Do you offer a bulk discount or other discounts?

A - Yes, purchase FIVE AAO Lowers and RECEIVE A 10% DISCOUNT on your lowers.  Or purchase any single AAO Lower and receive a 10% DISCOUNT on our AR15 Lower Parts Kit - LPK LRPK.

Q - What calibers can be built with a finished lower?

.223/5.56 - .22 - .204 Ruger - 300 AAC Blackout - 6.5 Grendel - 7.62x39 - 458 SOCOM - 45ACP - 9mm - FN 5.7 - 7.62x25 - 5.45x39

Q - Is an FFL required to purchase this product?

A - NO, an FFL is NOT REQUIRED to purchase this product.

   - Anyone can legally purchase a 80% Lower Receiver.  An 80% Lower Receiver DOES NOT have to be sold through or registered through a dealer with a FFL (Federal Firearms License).   

Q - What JIG do you recommend to finish the AAO lower?

A - AAO Lowers are compatible with any JIG that will complete a standard Mil-Spec AR Lower.  If you are finishing an AAO 9mm Lower, the Ejector and LRBHO are removable so it can work with any standard Mil-Spec JIG.

Q - What are the operations that must be completed to make the 80% lower fully functional:

A - Machine the following using your JIG to finish our 80 percent AR15 Lower Receiver.  Our 80% Lower Receiver has a fully broached finished Mag Well.   

  • fire control group
  • safety select hole
  • trigger opening
  • trigger pin holes
  • hammer pin holes 
  • The AAO 80% Lower Receiver has been machined to match MIL-SPEC from a 7075 AR15 Lower Forging.

Q - What is a AR15 80% Lower Receiver?

A - 80% lower receivers are parts that have been partially completed.  

   - 80 percent or 80% is a generic term that means that everything is complete on the lower except for the fire control group, safety select, trigger opening, trigger pin holes & hammer pin holes.

   - Utilizing a jig and the right techniques, any 80 percent lower can be quickly transformed into a highly accurate and functional firearm. 

Q - Does a AR15 80% Lower Receiver require transfer or registration through an FFL? 

A - No. This is a do-it-yourself product.. You start with a 80% product and end up with a complete functional product after your finish the machining using your jig. 

Q - Is it legal to do this?  May I lawfully make a firearm for my own personal use, provided it is not being made for resale?

A - This quote is taken directly from the ATF Website http://www.atf.gov/files/firearms/industry/0501-firearms-top-10-qas.pdf: "Firearms may be lawfully made by persons who do not hold a manufacturer's license under the GCA (Gun Control Act) provided they are not for sale or distribution and the maker is not prohibited from receiving or possessing firearms."

Q - Can I build and then transfer a finished firearm to another individual? 

A - Yes you can, however you must mark the firearm in accordance with 27 CFR 472.92 (formally 178.92). You must follow all laws that are in place today. Do yourself a favor an protect yourself, don't put a completed firearm in anyone's hands unless you have gone through proper channels and background checks. Following the proper channels will protect us, our family, and our friends. For any firearm transfer it is your responsibility to understand the federal and local laws and how they apply.  

Q - Is it legal to assemble a firearm from commercially available parts kits that can be purchased via the internet or via Firearms News?

A - This quote is taken directly from the ATF Web Site: "Firearms may be lawfully made by persons who do not hold a manufacturer’s license under the GCA provided they are not for sale or distribution and the maker is not prohibited from receiving or possessing firearms. However, a person is prohibited from assembling a non-sporting semiautomatic rifle or shotgun from 10 or more imported parts, as set forth in regulations in 27 C.F.R. 478.39" https://www.atf.gov/file/61721/download



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  • 5
    80% Lower AR15

    Posted by Bryant T on Dec 2nd 2018

    Fantastic quality and service. Wish I could give more stars!

  • 5
    80% ar15 lower

    Posted by Ricky T on Nov 29th 2018

    Best lower on the market.

  • 5
    ar15 80% lower

    Posted by Dev K on Oct 29th 2018

    Best quality fit and finish I have seen. Thanks for providing expensive quality at an affordable price.

  • 5
    ar15 lower 80%

    Posted by Clay T. on Oct 26th 2018

    Best kept secret in 80% lowers! Your quality is always above your competitors.

  • 5
    AR15 lower

    Posted by Richard W on Oct 23rd 2018

    You guys have the best quality fit and finish of any 80% company I have dealt with.

  • 5
    AR15 Lower

    Posted by George H. on Oct 9th 2018

    This is my 6th 80% build, but my first lower from you guys. This is the best lower I have ever received. I will buy all my lowers through you in the future.

  • 5
    80% lower

    Posted by Jerry on Sep 20th 2018

    Very nice lower with the added bonus of being a Gen 2 with the upper take up screw. Tks AAO

  • 5
    AR15 80% lower

    Posted by Dean on Sep 19th 2018

    I ordered three. They all look great. I test fit the upper form my colt ar15. Perfect fit. Looking forward to the paperweight to AR transformation! Thanks guys!

  • 5
    AR15 80% lower

    Posted by lewis on Aug 23rd 2018

    I have yet to complete these lowers, but the custom engraving work by Monty is fabulous! Couldn't be happier with that! Excellent craftsmanship and a real work of art for sure. Nicely packaged and also communication throughout the transaction was excellent! I for one really appreciate the service these folks are providing to our country! Thanks AAO!!!