I loved lightgun games on the old systems, and I think the Sega Saturn's Stunner was the best hardware of the lot. The obsolescence of CRTs pretty much killed the tech, but the gameplay style has made a bit of a resurgence a couple times with the advent of the Wii and VR.
Check out GUN4IR, I put together a two player setup last year and it's a ton of fun. The accuracy and response time are basically perfect. They also support solenoids for arcade games, but I haven't had the time to put that together yet.