Lightweight and ultra-lightweight gaming mice are all the rage these days, but just having the lightest gaming mouse out there doesn't automatically make them the best. The specs that make up the rest of the performance still have to be excellent, especially to keep up with the fast-paced movement of FPS games. Major gaming brands, like Logitech and Razer, are now starting to produce ultra-lightweight gaming mice, making them no longer a niche product from niche manufacturers like the Zuankoenig M2K.