Home CMMG How to Install an AR15 Lower Parts Kit

How to Install an AR15 Lower Parts Kit

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This video is a step-by-step tutorial on how to install the Palmetto State Armory (PSA) enhanced lower parts kit with a Magpul pistol grip and Magpul trigger guard.

Once you finish milling out your 80% lower, the next step is to install a lower parts kits. Typically, this includes the trigger and hammer assembly, takedown pins, trigger guard, safety selector and pistol grip. The importance of installing high-quality lower parts kit cannot be understated as any aspect out of spec can cause a malfunction of your AR15 build.

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9 COMMENTS

  1. Very good instructional video although you did miss one functionality feature that is very important and crucial to asure a safe and functional weapon would be the disconnector function such as holding the trigger down after firing the hammer and once you reload the hammer back and then you let go of the trigger and the disconnector lets the hammer fall on the sear then a second pull would release the hammer for firing once again, this is essential to check so that the gun resets correctly and you don't have a runaway gun, I also like to lightly file or sandpaper the edges of the pin that holds the bolt catch assembly in place which makes it a lot easier to start the pin into the slot but that's just a matter of preference, all else appears to be correct and very comprehensive, good job!

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