KM4 attached to the M500A:
Very nice. I am jealous. I only have a KM2. Did you get the KM4 separately or with a M900?
Here is an old Glock light mount. Dunno if you guys have seen this before. I dont rememeber what it is called or who makes it. I think I got it from a gun store a few years ago. again I dont remember much of this. I do know that it comes with an adapter collar so it will work with a AA Mini Maglite. I just moved, hence the boxes in the shot, but i cant find my mini mag to show you right now.
The light mount is designed for first gen glocks that dont have rail mounts on the frame.
Here is the mount. It slides onto the trigger guard.
It fits 1" lights. I think it was designed for 6P (I dont have one handy at the moment)
Here it is mounted on the glock. It puts the light offset to the side.
As you can see it brings the tailcap right to the thumb. You can activate it with the support thumb or one handed and use the fire control thumb. If you are left handed, you are out of luck.
It works well with SF a19