Introduced in 1986, it is available in several versions for civilian, law enforcement and military use.
The M1 features the proprietary Benelli recoil system.
Mounts are available for laser pointers and tactical flashlights.
Due to the inertia recoil system, the M1 requires heavier loads to cycle properly.
[1] https://www.gunpartscorp.com/gun-manufacturer/benelli/shotguns-benelli/semi-auto-shotguns/m1-super-90-field This article relating to shotguns is a stub.