Midwest Industries now has an extremely easy to install M-LOK mount for the KSG.
This mount not only provides a place to mount a light, but also provides a hand stop so should your hand slip off your vertical grip or your VG break you will not end up with your hand in front of the muzzle.
https://i1185.photobucket.com/albums...s5rfznp9d.jpeg
https://i1185.photobucket.com/albums...spnmqpibf.jpeg
https://www.midwestindustriesinc.com...ucts-s/577.htm