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How to Build the Perfect AR 15 Parts with GunBuilders

How to Build the Perfect AR 15 Parts with GunBuilders


Building the perfect AR 15 rifle doesn’t have to be a daunting task. With GunBuilders, the perfect AR 15 is only a few clicks away. Whether you’re looking for the most powerful AR 15 parts or the highest quality components, GunBuilders has everything you need to construct your dream AR 15. In this blog post, we’ll discuss the essential steps and components necessary to build the perfect AR 15 parts with GunBuilders.

The Lower Receiver

The lower receiver is one of the most important AR 15 parts, as it acts as the foundation for the entire rifle. It’s where all the other components attach, and it’s the only part that is legally considered a firearm. It holds the trigger group, magazine well, buffer tube, and pistol grip. When building an AR 15, choosing the right lower receiver is critical. There are two main types to consider: complete lowers and stripped lowers.

Complete lowers include all of the components necessary for your rifle to function, such as the trigger, pins, and springs. These are great for those who are new to AR 15 building and want an easy, hassle-free solution. On the other hand, stripped lowers are just what they sound like – stripped down receivers without any internal parts installed. They offer more customization options since you can choose each individual component that goes inside the receiver.

Whether you opt for a complete or stripped lower receiver, make sure to select one with high quality materials that will stand up to use and abuse. You should also keep in mind that certain states have restrictions on lower receivers, so make sure you’re familiar with your local laws before making a purchase. With the right lower receiver in place, you’ll be well on your way to building the perfect AR 15.

The Upper Receiver

The upper receiver is one of the most important AR 15 parts. It is the core of the firearm and houses many of the internal components such as the barrel, bolt carrier group, charging handle, and more. There are a few main types of upper receivers – stripped, complete, and barreled – which all have their own advantages and disadvantages. Stripped receivers are the bare bones version, only containing the bare minimum parts, while complete upper receivers come with everything you need to install your chosen barrel and bolt carrier group. Barreled upper receivers come with a barrel and handguard already installed, which can save you some time and money if you don’t plan on changing it out. No matter which type you choose, make sure it is compatible with your lower receiver for best results.


Barrels are an important part of building an AR 15, and they come in a variety of sizes and styles. Choosing the right barrel is essential to creating a reliable firearm, as well as optimizing accuracy and performance. The most popular type of barrel for an AR 15 is a mil-spec, hammer-forged, chrome-lined barrel with a twist rate of 1:7 or 1:8. This type of barrel is more durable and corrosion resistant than other types, and is suitable for a variety of calibers. When choosing a barrel for your AR 15, it’s important to consider the type of ammunition you plan on using as well as the intended purpose of the rifle. You also need to consider how many rounds you plan on shooting, as well as how accurate you want your rifle to be. With these considerations in mind, you can select the best AR 15 parts for your needs.

Muzzle Devices

Muzzle devices are an essential part of any AR 15 build. While they may seem like a small and insignificant part of the build, they play a large role in determining the overall performance of your firearm. There are many different types of muzzle devices available to choose from and it is important to understand the purpose of each one.

The most common type of muzzle device for AR 15 parts is the flash hider, which helps to reduce the flash signature from the weapon when fired. This is important for both concealment and safety. The flash hider also reduces recoil and helps maintain accuracy when firing multiple shots in quick succession. There are also muzzle brakes, which help reduce felt recoil as well as keeping your rifle on target. Finally, suppressors can be used to reduce the sound signature from your weapon and can be especially useful for shooting ranges or hunting applications.

No matter what type of muzzle device you decide to use, it is important to ensure that it is properly installed and fits the barrel of your rifle securely. Doing so will ensure that you get the best performance out of your AR 15 parts and will help keep you safe when shooting.


When building an AR 15, one of the most important parts to consider are the handguards. Handguards serve two purposes: protecting the shooter’s hands from heat generated by the barrel and providing a platform for attaching accessories like lights, lasers, and bipods. There are many types of handguards available for AR 15 parts, each with different levels of protection and accessory attachment options.

The most popular style of handguard is the drop-in handguard, which is designed to fit into the upper receiver’s barrel nut. Drop-in handguards offer a secure fit and generally come with a plastic or metal heat shield for extra protection from the barrel. They are also generally the most affordable option.

Free-float handguards are becoming increasingly popular, as they provide a longer uninterrupted rail surface for mounting optics and other accessories. Free-float handguards also feature an enclosed or semi-enclosed barrel nut that completely covers the gas tube, keeping the gas and carbon buildup away from the shooter’s hands.

These rail systems allow you to securely attach various attachments to your AR 15 parts while providing additional protection from heat and debris.

Whichever type of handguard you choose, it should provide enough space for comfortable shooting and should feel secure when attached to the rifle. Be sure to carefully review the installation instructions for whichever handguard you choose in order to ensure a secure fit and optimal performance.

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