The Holosun 507C is among the most durable and economically priced red dots that are around. This optic is perfect for pistol use, with a wide window and multiple reticle options. The solar panel on the top side increases battery life drastically and is a great added feature. Unlike many red dots in this price range you can choose between daytime and night vision settings at your convenience. With an almost unlimited battery life you don't need to worry about religously changing out your battery. When you want to however, the tray is placed on the side and is very easy to access. You can choose between using the outer ring, center dot, or collectively both when it comes to the reticle.