Appears as a usable weapon in Killing Floor, where it is limited to pump-action only.Appears as a usable weapon in Counter Strike: Source and Counter-Strike Online, where it is known as the 'Leone 12 Gauge Super'.Patience uses a shortened M3 in the first episode of Firefly.It finally appears in its normal form in Resident Evil 5 and Resident Evil: Revelations.It's also available in the remake of Resident Evil and Resident Evil 4, fitted with the M4's sliding stock, where it's respectively called the 'Assault Shotgun' and 'Riot Gun'.It's also available in the 2020 remake, where it has a traditional wooden stock and still fires in pump-action, though it can also be fitted with a Tactical Stock and Semi-Auto Barrel to turn it into an (anachronistic for the time period) M4, albeit still with the M3's sights and no scope rail.

It first appears in Resident Evil 3: Nemesis, where it goes without a stock and is pump-action only.It appears frequently in the Resident Evil games, almost as often as the Remington 870:.The M3 makes its first film appearance in RoboCop 2.

It also comes with a variety of accessories, including fixed, sliding or folding stocks, and different sight options.

It stands as the only one of the four shotguns in the series that is not semi-auto-only, as well as the last of the series to use the inertia recoil system originally adapted from the Model 512 shotgun Benelli co-developed with H&K. Developed from the earlier semi-auto-only M1, the M3 can switch between pump and semi-automatic using a selector ring at the weapon's front, for use with different shell power loads. The Benelli M3 is an Italian dual semi-automatic/pump-action shotgun, and the third in Benelli's 'Super 90' series.

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