How to Build an AR15: A Comprehensive Guide

Welcome, fellow gun enthusiasts! If you’re reading this, then you’re probably interested in building your very own AR15. First things first, building an AR15 is not as daunting as it may seem. It’s actually a fun and rewarding experience that allows you to customize your rifle to your liking. So, let’s dive into the step-by-step process of building an AR15.

Step 1: Research and Gather Parts

Before you start building, it’s important to do your research and gather all the necessary parts. This includes the lower receiver, upper receiver, barrel, bolt carrier group, buffer tube, trigger assembly, and handguard. There are many great online retailers that offer a wide variety of AR15 parts to choose from. It’s essential that you purchase quality parts from reputable manufacturers to ensure your rifle functions properly and safely.

Step 2: Assemble the Lower Receiver

The lower receiver is the heart of the AR15 and where the majority of the components are installed. To assemble the lower receiver, you’ll need basic tools such as a hammer, punch set, and vice. First, install the trigger assembly and then the magazine release. Next, add the bolt catch and pivot pin. Finally, attach the buffer tube and stock.

Step 3: Install the Upper Receiver

The upper receiver houses the barrel, bolt carrier group, and charging handle. To install the upper receiver, simply slide it onto the lower receiver and secure it with the takedown pin. Then, attach the charging handle and bolt carrier group.

Step 4: Install the Barrel and Handguard

The barrel is one of the most important components of your AR15. To install the barrel, first remove the handguard and then slide the barrel nut onto the receiver. Next, install the gas block and gas tube onto the barrel. Finally, attach the handguard and secure it with the barrel nut.

Step 5: Final Assembly and Testing

Once all the components are installed, it’s time for final assembly and testing. First, attach the muzzle device onto the barrel. Then, attach your optic or iron sights. Finally, test fire your rifle to ensure it functions properly and safely.

Tips for Building an AR15

– Do your research and gather quality parts from reputable manufacturers.- Invest in basic tools such as a hammer, punch set, and vice.- Take your time and follow the instructions carefully.- Test fire your rifle before taking it to the range.- Seek help from a professional if you’re unsure about any steps.


Building an AR15 is a fun and rewarding experience that allows you to customize your rifle to your liking. By following these steps and tips, you’ll be able to build a high-quality AR15 that functions properly and safely. Remember to take your time, do your research, and seek help if needed. Happy building!Until next time, stay safe and happy shooting!