Building Your AR Lower Receiver

By CTD Rob published on in AR-15, Firearms, How To, Rifles

So, you finally bought a stripped lower receiver and all the goodies that go along with it.

You excitedly tore open the box and checked to make sure we shipped you all the parts you needed to put together your first AR lower. You glare at the pile of parts and think to yourself, “Now what?”

Last year, we produced a series on how to put together the complete AR-15 lower receiver. As most of you know, the lower receiver houses the magazine catch, bolt catch, pivot pin, fire control group, trigger guard, selector, grips, pins and buffer tube. We still field a ton of questions about how to put these parts together, so we thought a rehash was in order. Installing these parts is fairly simple, and most people can do it without too many issues. However—when working on any firearm—if at anytime you feel you aren’t sure about what you are doing, take it to a qualified gunsmith.

 

Step 1: Installing the Magazine Catch

 

Step 2: Installing the Bolt Catch

 

Step 3: Installing the Pivot Pin

 

Step 4: Installing the Fire Control Group

 

Step 5: Installing the Trigger Guard

 

Step 6: Installing the Selector and Pistol Grip

 

Step 7: Installing the Takedown Pin and Buffer Tube

 

Stay Tuned!

Hopefully, this clears up some of the confusion. Once you do this a few times, most of the steps will become second nature. Stay tuned for more posts on AR builds. We’re going to pull some parts from the warehouse so we can throw together some uppers and barrels to see what we can come up with!

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Comments (30)

  • Cameron

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    How about having a female do the voice. That’s all

    Reply

  • Paul Peterson

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    Great info, thanks.
    Please make a video on the upper.

    Reply

  • Dennis

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    HI, I am new at this, so I ask a Question. I know that to order a complete firearm, one must have it shipped to a FFL holder. Would it be possible for me to order all the parts so that I can build a completed unit without having a FFL. I would like to do this, but Have never done it , is there a site or page that shows everything necessary to do a complete build ?

    Reply

  • Robert

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    Thanks for the video, it really helps out a lot. Now I feel I can do it one step at a time if I watch the video.

    Reply

  • Chris

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    Do you have a set of videos like this for the upper and barrel

    Reply

  • Dillon

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    Dennis, you need to have the stripped lower shipped to an FFL, the rest can just show up in your mailbox. That little chunk of metal (or plastic) is the “gun”, the rest are just “stuff”. With the chaos calming down (politics being political, something hotter always turns up) stripped lowers are again available for reasonable prices. CTD always seems to have a few choices on hand.

    And I do want a set on building an upper, please.

    Reply

  • First AR build - Page 2

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    […] Posted by TZCHRIS Where are the vids on cheaper than dirt? Building an AR Lower Receiver These videos walk you through step by step for the lower. I found them helpful. Reply […]

    Reply

  • Terry Weedon

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    is the Takedown pin’s Detent pin and spring needed for proper operation? I have a Colt AR15 A2 Sport Comp. H Bar. And cant get it to cycle right on .223 ammo, I’m gonna try true 5.56 ammo to see if the higher powder load will allow it to cycle. I know My rifle was made in the 1980′s, so I’m thinking it was made for the higher powder loads of the 5.56 only. I can fire .223 but i have to re-cock it every time and clear the spent shell,(usually it jams the spent casing).

    Reply

  • Brian

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    Great videos. Well done and extremely helpful

    Reply

  • Jose Angel Velez

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    these series of videos are excellentand cheaper than dirt has done an excellent job the technician who is working on the lower receiver did an excellent job its a gunsmith myself these videos are very handy and I’m glad that a wonderful company like cheaper than dirt have some available for beginners thank you cheaper than dirt for teaching other people this is there a little bit difficult but they can be accomplished by learning to your videos as a gunsmith for over 35 years I recommend cheaper than dirt with a big 10 and I am very glad they have these available for beginners novice and people who just want to learn how stoned rifles work you guys are wonderful and that’s why I like your company cheaper than dirt also carries for beginners novice advance and different rifles handguns also scope mounting so cheaper than dirt is a wonderful company or really Goes beyond the call of duty to help those for beginners those who have a little bit of experience and those who have a lot of experience so I’m very pleased with the videos as a professional gunsmith I recommend these videos for any person who wants to learn go to cheaper than dirt look at the catalog and you will find array of different items parts accessories and videos to help the new beginners and the old is a client from cheaper than dirt and a gunsmith recommend this company very highly also go to YouTube and you will find many more information on subjects as AR 15 ak-47s SKS is Mosin Nagants Mausers a lot of surplus rifles new your guns Glocks etcetera etcetera so enjoy yourself and remember 2 protects the Bill of Rights and the Constitution of the United States of America thank you very much to all of you out there who washes videos and learn about these wonderful things that we have in this country call the Bill of Rights and the constitution of this beautiful country of the United States of America cheaper than dirt has been around for a long time and is also highly recommended by the NRA there are a great company and I’m proud to have bought many parts from themI take this time to thank all of you and cheaper than dirt may God bless you all may God bless United States of America Sincerely Yours Jose angel Velez

    Reply

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