AIMPOINT COMPM5 $1,079 aimpoint.com
This is about the easiest to use red-dot I’ve ever attached to a firearm. The sight can be purchased with the base attached, making it a onepiece unit. Just insert one AAA battery and use the throw lever to clamp it to a Pic rail, and you’re in business. It’s light—just under 8.5 ounces with the AR15 spacer—but as tough as a railroad spike. It comes with integrated pop-up lens covers, can be submersed to 150 feet, and has intensity settings that cover the spectrum from night vision to retina burn. The CompM5 I have is designed so that it will co-witness with an AR’s iron sights for a hassle-free and lightning-quick sight picture. A single battery lasts for years.