How To Assemble An Ar 15 Lower?

How to Assemble an AR-15 Lower

The AR-15 is a popular rifle for both recreational and self-defense use. It is a relatively simple firearm to assemble, and with a few basic tools and some instruction, you can build your own AR-15 lower receiver at home.

In this article, we will walk you through the process of assembling an AR-15 lower receiver. We will cover the different parts of the lower receiver, how they work together, and the steps involved in assembling them.

By the end of this article, you will have a solid understanding of how to assemble an AR-15 lower receiver, and you will be able to build your own AR-15 with confidence.

What is an AR-15 Lower Receiver?

The AR-15 lower receiver is the heart of the rifle. It houses the trigger assembly, fire control group, and magazine. The lower receiver is also the part of the rifle that is serialized, making it the legally “firearm” part of the AR-15.

The AR-15 lower receiver is made of a lightweight alloy, such as aluminum or polymer. It is typically anodized black to protect it from corrosion. The lower receiver has a number of different parts, including:

• The trigger assembly
• The fire control group
• The magazine catch
• The bolt catch
• The safety selector
• The takedown pins

These parts work together to allow the rifle to fire, load, and unload ammunition.

How to Assemble an AR-15 Lower Receiver

The process of assembling an AR-15 lower receiver is relatively simple. It can be completed with a few basic tools and some instruction.

The following steps will walk you through the process of assembling an AR-15 lower receiver:

1. Assemble the trigger assembly. The trigger assembly is the heart of the AR-15 lower receiver. It is responsible for firing the rifle.
2. Assemble the fire control group. The fire control group is responsible for controlling the firing of the rifle. It includes the safety selector, the bolt catch, and the magazine catch.
3. Install the magazine catch. The magazine catch holds the magazine in place.
4. Install the bolt catch. The bolt catch holds the bolt open after the last round is fired.
5. Install the safety selector. The safety selector allows you to select between safe, fire, and semi-automatic fire modes.
6. Install the takedown pins. The takedown pins secure the upper and lower receivers together.

Once you have assembled the lower receiver, you can install it in the upper receiver and begin shooting.

Step	Tools	Instructions
1.	AR-15 lower receiver	Inspect the lower receiver for any damage.
2.	AR-15 lower parts kit	Install the trigger assembly, hammer assembly, and disconnector into the lower receiver.
3.	AR-15 buffer tube	Install the buffer tube into the lower receiver.
4.	AR-15 buffer spring	Install the buffer spring into the buffer tube.
5.	AR-15 buffer	Install the buffer into the buffer tube.
6.	AR-15 bolt catch	Install the bolt catch into the lower receiver.
7.	AR-15 bolt catch spring	Install the bolt catch spring into the lower receiver.
8.	AR-15 magazine catch	Install the magazine catch into the lower receiver.
9.	AR-15 magazine catch spring	Install the magazine catch spring into the lower receiver.
10.	AR-15 takedown pins	Install the takedown pins into the lower receiver.

3. Install the buffer tube assembly into the lower receiver.

The buffer tube assembly is a critical component of the AR-15 lower receiver. It houses the buffer spring and buffer, which help to absorb recoil and cycle the action. The buffer tube assembly also provides a mounting point for the stock.

To install the buffer tube assembly, you will need the following tools:

• AR-15 lower receiver
• Buffer tube assembly
• AR-15 castle nut wrench
• AR-15 end plate
• AR-15 buffer spring
• AR-15 buffer

1. Insert the buffer tube assembly into the lower receiver.
2. Align the castle nut with the two holes in the lower receiver.
3. Use the castle nut wrench to tighten the castle nut until it is snug against the lower receiver.
4. Install the end plate onto the castle nut.
5. Insert the buffer spring into the buffer tube assembly.
6. Insert the buffer into the buffer tube assembly.

The buffer tube assembly is now installed.

4. Install the stock onto the buffer tube assembly.

The stock is the final component that you will need to install on your AR-15 lower receiver. The stock provides a comfortable place to rest your shoulder when firing the rifle.

To install the stock, you will need the following tools:

• AR-15 lower receiver
• AR-15 stock
• AR-15 stock adapter
• AR-15 stock screw

1. Insert the stock adapter into the buffer tube assembly.
2. Align the stock with the two holes in the lower receiver.
3. Insert the stock screw through the stock and into the stock adapter.
4. Use a screwdriver to tighten the stock screw until it is snug against the lower receiver.

The stock is now installed.

Congratulations! You have now successfully assembled your AR-15 lower receiver. Now all you need to do is add a complete upper receiver and you will be ready to go shooting.

Here are some additional resources that you may find helpful:

• [AR-15 Lower Receiver Assembly Instructions](https://www.ar15.com/content/ar-15-lower-receiver-assembly-instructions/)
• [AR-15 Upper Receiver Assembly Instructions](https://www.ar15.com/content/ar-15-upper-receiver-assembly-instructions/)
• [AR-15 Parts List](https://www.ar15.com/content/ar-15-parts-list/)
• [AR-15 Troubleshooting Guide](https://www.ar15.com/content/ar-15-troubleshooting-guide/)