How To Assemble Ar 15 Upper?

The AR-15 is a popular rifle for both personal defense and competition shooting. It’s easy to use and maintain, but it can be a bit daunting to assemble your own upper receiver. In this article, we’ll walk you through the process step-by-step, so you can have your AR-15 up and running in no time.

We’ll start by discussing the different parts of an AR-15 upper receiver, and then we’ll show you how to put them together. We’ll also provide tips on how to troubleshoot any problems you might encounter. By the end of this article, you’ll be able to assemble your own AR-15 upper receiver with confidence.

So if you’re ready to learn how to assemble an AR-15 upper receiver, keep reading!

Step	Instructions	Image
1	Assemble the upper receiver
2	Install the barrel
3	Install the bolt carrier group
4	Install the charging handle

The AR-15 is a popular rifle for a variety of reasons. It is lightweight, accurate, and easy to use. It is also relatively inexpensive, making it a good option for first-time gun owners.

One of the best things about the AR-15 is that it is modular. This means that you can easily customize it to your specific needs. One of the most common modifications is to change the upper receiver. This can be done for a variety of reasons, such as changing the caliber of the rifle, adding a suppressor, or simply changing the look of the rifle.

If you are thinking about changing the upper receiver on your AR-15, it is important to know how to do it correctly. This guide will walk you through the process step-by-step.

Parts of an AR-15 Upper

The upper receiver is the part of the AR-15 that houses the barrel, bolt carrier group, and charging handle. It is also where the handguard and muzzle device are attached.

The upper receiver is made up of a number of different parts, including:

• The upper receiver extension (also known as the “barrel extension”)
• The barrel nut
• The handguard
• The gas block
• The gas tube
• The forward assist
• The dust cover

Let’s take a closer look at each of these parts.

Upper receiver extension

The upper receiver extension is a cylindrical piece of metal that is attached to the rear of the upper receiver. It is also known as the “barrel extension” because it houses the barrel.

The upper receiver extension is held in place by the barrel nut. The barrel nut is a large, threaded ring that is screwed onto the threads of the upper receiver extension. The barrel nut is tightened until it is snug against the upper receiver extension.

Barrel nut

The barrel nut is a large, threaded ring that is screwed onto the threads of the upper receiver extension. The barrel nut is tightened until it is snug against the upper receiver extension.

The barrel nut is important because it helps to secure the barrel to the upper receiver. It also helps to align the barrel with the gas tube.

Handguard

The handguard is a cylindrical piece of metal or plastic that is attached to the front of the upper receiver. It provides a place for the shooter to grip the rifle.

The handguard also helps to protect the barrel from heat. When the rifle is fired, the barrel can get very hot. The handguard helps to dissipate this heat, preventing it from burning the shooter’s hand.

Gas block

The gas block is a small, cylindrical piece of metal that is located near the front of the barrel. It is responsible for directing gas from the barrel into the gas tube.

The gas block is held in place by the gas tube. The gas tube is a small, hollow tube that runs from the gas block to the bolt carrier group.

Gas tube

The gas tube is a small, hollow tube that runs from the gas block to the bolt carrier group. It is responsible for carrying gas from the gas block to the bolt carrier group.

The gas tube is important because it allows the rifle to cycle. When the rifle is fired, the gas from the barrel is directed into the gas tube. This gas then travels to the bolt carrier group, where it drives the bolt back and unlocks the action.

Forward assist

The forward assist is a small lever located on the right side of the upper receiver. It is used to manually push the bolt forward into battery.

The forward assist is important because it can be used to clear a malfunction. If the bolt does not go into battery, the forward assist can be used to manually push it forward.

Dust cover

The dust cover is a small, hinged flap that covers the ejection port. It is designed to keep dust and debris out of the action of the rifle.

The dust cover is important because it helps to protect the rifle from the elements. When the rifle is not in use, the dust cover can be closed to keep out dirt and debris.

Tools and Materials Needed

In order to assemble an AR-15 upper, you will need the following tools and materials:

• AR-15 upper receiver
• Barrel
• Bolt carrier group
• Charging handle
• Handguard
• Muzzle device
• Gas block
• Gas tube
• Forward assist
• Dust cover
• AR-15 wrench
• AR-15 torque wrench
• AR-15 armorer’s tool
• Penetrating oil
• Blue loctite

Instructions

1. Assemble the barrel and gas block.

The first step is to assemble the barrel and gas block. To

Assembly Instructions

1. Install the barrel in the upper receiver

1. Locate the barrel extension on the barrel. The barrel extension is a cylindrical protrusion on the rear of the barrel that mates with the bolt carrier group.
2. Insert the barrel extension into the upper receiver. The barrel extension should slide into the upper receiver until it is flush with the rear of the receiver.
3. Secure the barrel extension in the upper receiver with the barrel nut. The barrel nut is a threaded collar that screws onto the barrel extension. Tighten the barrel nut until it is snug against the upper receiver.

2. Install the bolt carrier group in the upper receiver

1. Locate the bolt carrier group (BCG). The BCG is a cylindrical assembly that contains the bolt, firing pin, and extractor.
2. Insert the BCG into the upper receiver. The BCG should slide into the upper receiver until it is flush with the front of the receiver.
3. Secure the BCG in the upper receiver with the charging handle. The charging handle is a lever that is used to cock the BCG. Insert the charging handle into the rear of the BCG and rotate it clockwise until it is locked in place.

3. Install the charging handle in the upper receiver

1. Locate the charging handle. The charging handle is a lever that is used to cock the BCG.
2. Insert the charging handle into the rear of the BCG. The charging handle should slide into the BCG until it is flush with the rear of the receiver.
3. Rotate the charging handle clockwise until it is locked in place. The charging handle should be able to move freely when it is locked in place.

4. Install the handguard on the upper receiver

1. Locate the handguard. The handguard is a cylindrical sleeve that covers the barrel and gas system.
2. Align the handguard with the barrel nut. The handguard should be aligned with the barrel nut so that the gas tube can pass through the handguard.
3. Secure the handguard in place with the barrel nut. Tighten the barrel nut until it is snug against the upper receiver.

5. Install the muzzle device on the barrel

1. Locate the muzzle device. The muzzle device is a device that is installed on the end of the barrel to reduce muzzle flash and/or recoil.
2. Thread the muzzle device onto the barrel. The muzzle device should be threaded onto the barrel until it is snug against the shoulder of the barrel.
3. Secure the muzzle device in place with the crush washer. A crush washer is a thin metal washer that is installed between the muzzle device and the barrel. When the muzzle device is tightened, the crush washer will deform and create a seal between the two parts.

6. Install the gas block on the barrel

1. Locate the gas block. The gas block is a cylindrical device that is installed on the barrel to direct gas from the barrel to the bolt carrier group.
2. Align the gas block with the gas port on the barrel. The gas block should be aligned with the gas port so that gas can flow from the barrel to the gas block.
3. Secure the gas block in place with the set screws. The gas block should be secured in place with two set screws.

7. Install the gas tube on the gas block

1. Locate the gas tube. The gas tube is a small tube that connects the gas block to the bolt carrier group.
2. Insert the gas tube into the gas block. The gas tube should slide into the gas block until it is flush with the front of the block.
3. Secure the gas tube in place with the roll pin. The gas tube should be secured in place with a roll pin.

8. Install the forward assist on the upper receiver

1. Locate the forward assist. The forward assist is a small lever that is used to manually push the bolt carrier group forward.
2. Insert the forward assist into the forward assist slot on the upper receiver. The forward assist should slide into the slot until it is flush with the front of the receiver.
3. Secure the forward assist in place with the roll pin. The forward assist should be secured in place with a roll pin.

9. Install the dust

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In this comprehensive guide, we have discussed the steps on how to assemble an AR-15 upper receiver. We have covered everything from choosing the right parts to assembling the upper receiver. We hope that this guide has been helpful and that you are now able to assemble your own AR-15 upper receiver.

Here are some key takeaways from this guide:

• When choosing parts for your AR-15 upper receiver, it is important to make sure that they are compatible with each other.
• The most important part of the upper receiver is the barrel. When choosing a barrel, you need to consider the caliber, length, and twist rate.
• The gas system is another important part of the upper receiver. The gas system determines how the rifle cycles.
• The handguard is the part of the upper receiver that you will interact with the most. When choosing a handguard, you need to consider the length, material, and mounting system.
• The muzzle device is the part of the upper receiver that attaches to the end of the barrel. Muzzle devices can be used for a variety of purposes, such as reducing recoil, flash suppression, and muzzle blast.

We hope that you have found this guide helpful and that you are now able to assemble your own AR-15 upper receiver. If you have any questions, please do not hesitate to contact us.