I have the Midwest Industries handguard as well. I mounted a Surefire Scout Pro to a T.Rex Arms light bar Pro mount. Replaced the Surefire tail cap with a Unity Tactical Gascap and am using a Unity Tactical AXON SL usb switch on the opposite side to activate the light (need the m-lok mounting kit for switch as well). Used 2 Magpul WCK to clean up the wiring underneath. So far, it works great.