The AR-15 is a very popular firearm, and many gun enthusiasts enjoy the process of building their own instead of purchasing one that is already completely assembled. Building an AR-15 can be a very enjoyable experience, but for the best results you need to be prepared and know what you're getting into. It is easy to get excited and dive into the project, but being patient and taking your time will result in having a treasured firearm that you can enjoy for many years to come.