What options exist for mounting a light to the FSB on an AR?
I have no use for a quad rail, and don’t particularly like the add-on rails for the standard M4 handguards. The FSB seems like the logical place to me.
I won’t have a light on 100% of the time, so I’d like a solution that is the least obtrusive when the light is not installed.
Pictures would be [tony the tiger] GgrrrrrrrEat! [/tony the tiger]
Sure did. 
Aside from the MI mount, I didn’t see anything in that thread that facillitates mounting to the FSB.
I don’t really like th MI mount, because it puts a rail on both sides of the FSB, and I only need it on one side.
I’m hoping that there is an alternative out there that is even more basic and simple.
GG&G has a mount, that puts a sling swivel on one side and arail on the other, I think they have just the rail also.
I beleive SureFire still has a light that mounts the FSB, in the classic line.
Bob
Have you checked out the Elzetta flashlight mount?
Here is one mounted on my carbine:

Ned Christiansen has an excellent mount. You need to send your upper to him to have it installed.
http://michiguns.net/tools.php