Re: Looking for Soft Rubber AR10 Handguard
If you are thinking of something along the lines of the Hogue Overmolded rubber/aluminum free-float tubes...none that I am aware of.
Why, may I ask, do you want one? Have you considered a railed handguard with some sort of rail covers?
Ergo Grips makes a couple very nice full-panel rail covers that use their suregrip (pencil eraser-texture) surface and they work very well for both protecting your rails and keeping your hands off a cold aluminum rail during colder weather shooting.