Finally put the last item on my wife's 870. Put the Surefire 618LMG on. It works and feels great. Chose it over the Eotech due to the Eotech depth down from the mag-tube and its construction. Surefire just feel more solid and you can get a better grip on it. Also, the lip that comes down off the Eotech just below the flashlight seems to give some folks a bit of trouble on the recoil. Nice and bright at 200 lumens as well; followed always by a nice bright muzzle flash.
Strapy, really good and user-friendly setup. Flashlight to identify a target, holographic sight for easy aiming and recoil-reducing stock to shoot comfortably!