AR-15 Lower Receivers

The AR-15 lower receiver is a key portion of your build. It’s the one part of the AR-15 that is serialized and considered a “firearm”, and its sale is regulated by the ATF.  AT3 strives to make the process as simple as possible to help you shop for the lower READ MORE

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See what our customers are saying about us!

AT3’s instructional videos on every aspect of the AR15 are invaluable. I watched them all on YouTube over the past week, and my first AR15 is being delivered today. I am looking forward to tinkering with my new rifle using AT3’s knowledge base as my guide.

~ John E.

First I wanna say amazing customer service my items arrived really fast and packaged very safely. Second the FDE is a perfect match for Magpul products. I paired my AT3™ FF-ML 10.5″ Complete AR 15 Pistol Upper with Franklin Armory lower with bfs||| trigger .. AMAZING! GOT A FOREVER CUSTOMER HERE AT3!

~ Joshua H.

I've ordered a few times from these guys. Prices are great. Things ship fast. Like next day shipped out. Can't ask for more! Also, their AT3 line of products are legit.

~ David J.

I ordered from AT3 for the first time on Monday and I received my order today (2 days later). When a lot of companies are making excuses for long turnover times, AT3 provides top notch customer service and very fast shipping.

~ Brian M.

The AR-15 lower receiver is a key portion of your build. It’s the one part of the AR-15 that is serialized and considered a “firearm”, and its sale is regulated by the ATF.  AT3 strives to make the process as simple as possible to help you shop for the lower you want, with prompt shipment to your FFL of choice.  Just make sure to brush up on your local regulations before making an order!

For more information about legalities surrounding lower receivers, check out our article on the serialized lowers and 80% lowers.

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