Installing your AR-15 lower parts kit doesn’t have to be difficult. While we could (and have) provide a detailed, written step by step on how to install your lower parts kit, sometimes it’s just easier to watch a video. We produce a number of step by step, how-tos, and product overview videos but sometimes it’s nice to break from the norm. Below is a detailed video on installing an AR-15 lower parts kit from our friends at 80percents.com. We may agree with a lot of their method of installation but it is their method. We don’t take credit for how they’ve done the install.