In this video tutorial, we'll show you how to assemble your AR-15 upper receiver from individual components. The upper receiver is an important part of your firearm, and plays a crucial role in accuracy and performance. We'll cover all the necessary steps, from installing the barrel and gas block to attaching the hand guard and muzzle device. This guide is perfect for both novice and experienced builders, and can be completed with just a few basic tools. So whether you're building an AR rifle from scratch or simply want to upgrade your existing upper, this video is a great resource for any AR-15 enthusiast. Download and add to your reference library! Runtime: 16 minutes 33 seconds.