A.R.M.S who manufacture AR-15 sights and mounts, and of whom the US military is customer, have developed a flashlight mount for the AR-15 called the Ring of Fire.
Photos Copyright Remigiusz Wilk (REMOV). Used with permission.
It is not hard to see how it got its’ name. The ROF can hold 6 flashlights. It could be used to hold IR lights or high intensity flashlight (for blinding people), lasers or any combination.
UPDATE: A couple more photos by SMGLee. It looks smaller than it does in the above photo.
Click to expand. Photo ⓒ Chen “SMGLee” Lee. Used with permission.
Click to expand. Photo ⓒ Chen “SMGLee” Lee. Used with permission.