Crimson Trace LG-207 for S&W K, L, & N Frame, New in Box w/ All Factory Items
I have a new in the box model LG-207 Crimson Trace Laser Sight Grip that fits many Smith and Wesson revolvers of K,L, and yes (believe it or not, thanks to a clever spacer) N frame. It will work on round or square butt models. There is a list of models that it fits on the side of box, see pictures below. The cheapest I've seen these were on Amazon for $131.99.