I have a Surefire model 917 FA (9 volt 3 batteries) for sale. It includes MN10 and MN11 bulbs rated at 120 and 225 lumens. One side has on/off buttons and the other is a pressure pad. A switch blocker is included for the pressure pad side to keep from accidentally triggering the light. I no longer have the Benelli and found this in the parts pile. Asking $175 delivered in the lower 48 priority w/ del. confirmation. USPS MO only. Post I'll take it and follow with IM please.
When I used this light I had no cycling issues with slugs or buckshot. I couldn't say about lighter loads and I've heard some Benellis get finicky with added weight.
ETA I seem to recall reading that this light will only fit M1S90 models with a serial number above 104000 for some reason.