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AR-15 Lower Receiver Parts

Build an exceptional AR-15 with high-quality lower parts kit from AT3 Tactical

Among the different AR-15 parts, the lower parts kit is the most important.

In AR-15, the lower receiver is considered the legal receiver or the legally controlled part. Hence, it’s the part that is serialized.

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Magpul M3 25 Rd Magazine - 308 Win/7.62NATO Caliber - Fits DPMS/SR25/LaRue OBR - MAG292

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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.

Build an exceptional AR-15 with high-quality lower parts kit from AT3 Tactical

Among the different AR-15 parts, the lower parts kit is the most important.

In AR-15, the lower receiver is considered the legal receiver or the legally controlled part. Hence, it’s the part that is serialized.

Browse through our list of standard AR-15 lower receiver such as buttstocks, receiver extension buffer tube parts, pistol grips, triggers, magazines, and other lower parts kit.

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