Assembling an AR-15 Upper

Have you ever thought of building your own custom AR-15? Have you ever wanted different calibers other than just 5.56/.223 in your AR-15, but didn’t know how to assemble a complete upper or barrel and BCG (Bolt Carrier Group) that would suit your needs? Well, this is the perfect article for you to read as it will give you all of the basic information you need to know about assembling your own AR-15! Learn and understand each component individually and which tools are actually required for a successful build. We will be covering the major parts that go into the AR-15 upper receiver covering the main variations in gas block, barrel, and handguard installations, while also making sure you know the significance of the BCG (Bolt Carrier Group). Please note that this is only for educational purposes. Please hire a professional to do this task if you don't have the necessary equipment or knowledge, or purchase a ready-made rifle.

Let's start off by highlighting how amazing and distinctive the AR-15 platform is. It is one of the most enjoyable guns to assemble and fire because there are so many possible parts combinations. If you're building an AR from the ground up or simply swapping out worn-out components for new ones, this list of AR-15 tools is a great resource. These are the tools that you should keep in your gun toolkit for the foreseeable future. The number one tool should be an armorer's wrench in order to start assembling your AR-15 upper assembly. You'll need an armorer's wrench to do the task properly whether you're manufacturing AR15 builds, upgrading them, or simply changing a flash hider.

First, you need an upper receiver either a fully assembled or stripped AR-15 upper receiver. An AR-15 stripped upper receiver usually houses the BCG or known as the Bolt Carrier Group, which is one of the main components of the AR-15 that enables it to cycle rounds back and forth and eject the rounds out of the ejection port. This upper receiver also enables you to charge the weapon with a charging handle which is usually in the rear. This is so it can go into “battery” or ready-to-fire mode with a round in the chamber, awaiting the trigger pull to fire the weapon. You will need to purchase the BCG separately with a charging handle. Next, you will need a handguard and barrel. This new generation of MLOK handguards is usually the way to go as it offers a sleek gripping option with endless attachment possibilities, using Magpul’s proprietary technology known as MLOK. The next major component you need is a gas block, and an MLOK handguard also allows the user to use a low-profile gas block option. The final part you will need to conclude the build is a flash hider or a muzzle break, which is known to reduce felt recoil and overall muzzle flash from each shot.