I want to mount my Fenix TK-41 to the picatinny handguards on my AR. The barrel of the light is 1.575" in diameter and 5" long. I would like to mount it like a scope using two scope rings, but I can't find any rings that would fit around the light. Yes, this is absolutely necessary. The light is 800 lumens and good to 400-500 yards to make out targets. I need more than what a regular 1" dia. ~200 lumen light can provide. Any suggestions other than some metal cable clamps?