Home CMMG How to Assemble a Modern AR15 Lower Step-by-Step

How to Assemble a Modern AR15 Lower Step-by-Step

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Ever wanted to build your own AR15? In this video, I’m going to show you how to assemble an AR15 Lower Step-by-Step from start to finish with my twist of two modern upgrades.

Knowing how you rifle works down to every piece of the assembly is important for any prepper or gun enthusiast. In this video, we’ll walk you through the assembly of an AR15 lower receiver, complete with all the necessary parts you need after the purchase of your registered lower. Watch as we demonstrate how to install the front detent pin, bolt release, mag release, and all the other necessary steps to build a AR15 lower. Plus, see the two modern upgrades that I make to my lower over traditional AR15 lowers.

For this AR Build we used parts from @Magpul, @AeroPrecision, @AndersonManufacturing, @CMMG, @RISEArmament, and @midwayusa

00:00 – Introduction
00:30 – AR-15 Parts Required
01:35 – Install Front Detent Pin
03:08 – Assemble Bolt Release
06:50 – Installing Mag Release
09:07 – Trigger Install
15:14 – Install Safety Selector
16:40 – Grip Install
18:02 – Install Buffer Tube
23:32 – Final Assembly

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12 COMMENTS

  1. great video! But i ahve a question. my lower has another pin over the fire selector that holds another piece of metal with a small spring. yours dont seem to have it. i thought this piece is wrongly build in. i dont know what it is or what it does.

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