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AR 15 lower receiver assembly video



This video will show you how to assemble your AR 15 lower from to its individual components. This video is designed for people that need to assemble their lower from either repairs or for building a new rifle. Even though this video features an AR 15, what we show you also apply to the AR 10 lower as well. In fact, the AR 10 lower only has a few parts that are different but otherwise uses the same parts. 

AR 15 Lower Receiver Assembly – Background Information

The Armalite Rifle 15 (AR 15) is one of the most popular modern sporting rifle. The AR 15 is used for target shooting, hunting and competition. Its modern look makes people think that this rifle is a complex design and hard to work on. Our video series will show you that these are fairly simple design which makes them easy to work on. This video series concentrates on the AR 15 but the same methods work on the AR 10 lower receiver as well.

Don’t forget to check out our AR 15 upper receiver disassembly, AR 15 upper receiver assembly AR 15 lower disassembly  and AR 15 field strip videos.

AR 15 Lower Receiver Assembly – Learn More

If you want to learn more about the tools used in the AR 15 Videos visit If you need more information about troubleshooting visit our AR Troubleshooting Guide at

AR 15 Lower Receiver Assembly – Video index:

Installing the bolt catch – 0:34

Installing the trigger guard – 2:57

Installing the rear takedown pin – 4:08

Assembling the collapsible stock – 5:35

Installing a collapsible stock – 7:08

Installing an A2 stock – 10:13

Installing the front takedown pin – 12:18

Installing the magazine catch – 13:45

Installing the trigger spring – 15:15

Installing the trigger – 16:21

Installing the selector and pistol grip – 18:05

Installing the hammer spring – 20:03

Installing the hammer – 20:29

Installing the buffer and buffer tube – 22:11

Does it work? – 22:56

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