Sale 45%

80% AR15 Lower Receiver – 7075 – Anodized Black


SKU: A15-80-A Categories: ,


Anodized Type III Hardcoat – AAO 80% AR15 LOWER RECEIVER 

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.

– 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 is the finish of the lower?

A – Anodized Black – Type III Hardcoat

Q – What LRPK (LPK) will work?

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

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 TEN AAO AR15 80% Lowers and RECEIVE A 10% DISCOUNT on your lowers.

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

.223/5.56 – .22 – .204 Ruger – 300 AAC Blackout – 6.5 Grendel – 7.62×39 – 458 SOCOM – 45ACP – 9mm – FN 5.7 – 7.62×25 – 5.45×39

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 “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”



Additional information

Weight 0.4535923696 kg
Dimensions 9 × 4 × 3 cm
Order 5 - 80% Lowers - 10% Discount

Serial Number / CA Engraving

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Extra Mag Well Engraving

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22 reviews for 80% AR15 Lower Receiver – 7075 – Anodized Black

  1. Doug B.

    I bought a 5 pack of these lowers. The quality is excellent and the finish is perfect. Thanks for a quality product at a good price.

  2. Shane S.

    Quality lower at a great price!

  3. Jim C.

    Excellent machining and finish. Fast shipping. Could not ask for more.

  4. Bryan B.

    Great product. Great service.

  5. Denver K

    Best quality and finish I have seen.

  6. Scotty F

    Perfect anodizing. Perfect fitment. Shipped fast.

  7. Adrian D

    A+ in my book. Thanks for the great service.

  8. Cole Brown

    This lower is awesome. I appreciate your commitment to quality!

  9. RMI-LTD

    Great 80% receiver. Same quality as name brand completed receivers I’ve purchased!

  10. Mike V

    … because of the built in lower to upper adjustment feature, Safe / Fire laser etched into the receiver and best of all – the quality of finish and pricing! Because of these “no extra charge” features, I placed a second order! No need to look any further for your 80% receiver needs. Thank you AAO!

  11. John kasse

    Great lower, with all the right “bells and whistles”, right down to the installed tension screw ! Great value

  12. Jason

    Lowers were shipped quickly, arrived well packaged and fit and finish is top notch. great product for a great price

  13. Jeff L

    Well made part!

  14. Mike

    Anodizing is exceptional. Having safe/fire engraved already is icing on the cake. Can’t wait to mill the two I purchased!


    Fourth order with AAO. Good service and quality product. Thank you again.

  16. Texas Hill Country Boy

    Whether raw or anodized, the quality of the units purchased in my numerous orders has been excellent. A great product at a very good price.

  17. LaDeShots

    I have used several different lowers and these are right on par with the best of them. Found AAO when looking for an AR-9 lower with LRBHO and was impressed with their quality. Will continue to buy from AAO for all my 80% needs.

  18. Mark

    The fit and finish on these are the best on the market. They do not require any filing for the LPK to fit.

  19. Luke

    This lower was more than I expected. Is is a great price. The locking lug was pre drilled and also came with lug tightening set screw. 100% satisfaction and more

  20. Marcus

    Shipping was damn fast! Especially with this whole covid stuff going on. solid material and a great finish!

  21. “B”

    Looks really good, has a nice finish, shipping was fast. I have not cut it all the way but I’m really happy with it so far. Going to be ordering more soon.

  22. Jesse

    Great lowers at great prices and shipping was quicker than most other suppliers. Buying another 5 pack soon

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