 And to show you whether you're dry firing at home or you're at the range, show you exactly what you're doing right and what you're doing wrong. And it shows you how to correct it. It's Mantis X. Mantis X is a high-tech, easy-to-use system widely used by the military. It started with the Marines, and it helps you improve your shooting quickly. You attach it to your firearm, and you connect it with an app on your smartphone or tablet via Bluetooth.