I found this article and video interesting and worthwhile though it doesn't exclusively feature the BENELLI M4. Take from it what you want and yes, I read AMMOLAND daily.
https://www.ammoland.com/2025/11/manual-of-arms-for-serious-shotgun-defensive-use-video/
BamBam-
Whenever you’re ready, PM me and we can work out what you want done. I am a FFL so the receivers can be sent directly to me and sent right back to their owner.