Red dot sights, like all optics, add weight and bulk.
Worse yet, the mounts used for them raise the line of sight significantly above the bore. Weaver mounts are terrible in this regard.
In general, they take a big chunk out of your gun’s inherent ergonomics.
With that in mind, if someone is still committed, I personally think the finest option is the German-made “DOCTER” red dot sight. It is very solid, better made than most other red dot options.
Oliver Heuer makes a low-line sight mount for the S&W K & L
frame for use with the Docter sight.
Look up “Jagd & Sportwaffen Oliver Heuer”.
(See picture)
