How to Build Your Own AR-15 Rifle from an AR-15 Kit

How to Build Your Own AR-15 Rifle from an AR-15 Kit

Are you looking to build your own AR-15 rifle? If so, you may want to consider purchasing an AR-15 kit. An AR-15 kit is a great way to get all the parts you need to assemble your own rifle from the comfort of your own home. With the help of an AR-15 kit, you'll be able to create a custom rifle that meets your individual needs and preferences. In this blog post, we'll go over how to build your own AR-15 rifle from an AR-15 kit, including what components are included in the kit and the steps necessary for assembly.

Choosing your kit

When it comes to building your own AR-15 rifle, the most important decision is choosing the right kit. offers a variety of Classic Lower Build AR-15 kits that will fit your budget and needs. Each kit includes everything you need to build your own custom AR-15 rifle.

The basic Classic Lower Build kit includes the stripped lower receiver, mil-spec parts kit, adjustable stock, buffer tube assembly, and magazine. The upper receiver is sold separately and must be purchased separately. The Standard kit includes all the parts from the basic kit plus a 16” M4 barrel with 1:8 twist rate and .223 Wylde chamber, as well as a tactical charging handle and an M-Lok handguard.

For those looking for a more robust setup, the Elite kit includes all of the components from the Standard kit plus an upgraded trigger, forward assist, dust cover, and ambidextrous charging handle. All Classic Lower Build kits come with the highest quality parts and are backed by a lifetime warranty. So whatever your budget and needs are, has the right Classic Lower Build AR-15 kit for you.

Assembling the Lower Receiver

Assembling the lower receiver of an AR-15 rifle is a critical step in building a rifle from one of the many ar 15 kits available on the market. When assembling the lower receiver, it is important to pay attention to detail, as this is the foundation of your rifle.

First, you'll want to install the buffer tube assembly. To do this, locate the receiver extension, buffer retainer, and castle nut. Assemble these components, then slide the buffer tube onto the receiver. Next, secure the tube by tightening the castle nut using a wrench.

Next, you'll need to attach the trigger assembly. This includes the disconnector, hammer, trigger, and pins. Place each component in its designated spot and secure with the pins provided with your kit.

Lastly, attach the safety selector lever to the side of the lower receiver. The safety selector should be firmly attached and move smoothly between “Safe” and “Fire” positions. Once complete, your lower receiver should be fully assembled.

Assembling the Upper Receiver

Once you have the components of your lower receiver together, it's time to move onto the upper receiver. This is where the fun really starts when building your AR-15 from a kit!

The upper receiver is the part of your rifle that contains the barrel, bolt carrier group, and charging handle. It is also the part of the gun that houses the optics and other accessories like lights and lasers.

Before getting started, make sure you have all the necessary tools and parts you will need to complete this stage of your build. These can usually be found at or your local gun store. You will need a barrel nut wrench, an admirer’s wrench, a torque wrench, and some threadlocker.

Once you have all of your tools gathered, begin by removing the barrel nut, delta ring, and handguard retainer. These parts will not be reused so they can be discarded. Next, you will need to slide on the barrel extension and barrel nut. Be sure to thread it on as far as it will go before tightening it with your barrel nut wrench. Once tight, torque it to the manufacturer’s specifications using your torque wrench.

Now it’s time to install your gas tube. Before you do this, you should check the gas port size of your barrel. Make sure you have a gas tube that matches it. You can easily find this information on or from the manufacturer of your barrel. Once you have the correct size gas tube, slide it into place until it clicks into the barrel extension.

Finally, you will need to attach your charging handle and handguard. To do this, use your armorer’s wrench to loosen the barrel nut slightly before sliding them on. Once they are in place, tighten the barrel nut again and apply a small amount of threadlocker to ensure everything stays secure.

And that’s it! Now you have successfully assembled the upper receiver of your AR-15 rifle from an AR-15 kit. Good luck with the rest of your build!

muhammad shakeel

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