The M3 is the second shotgun made available to players in Resident Evil 5. It can be found in Chapter 3-3.
Starting off, the M3 has a firepower of 300, a reload speed of 3.00 seconds, and a capacity of 5 shells. Fully upgraded, it has a firepower of 900, a reload speed of 2.70 seconds, and a total capacity of 10. The M3 has no critical value.
The M3 seems to be similar to the previous Riot Gun, having good specifications and replacing the first shotgun. With a maximum firepower of 900, it is the second most powerful shotgun available in Resident Evil 5 (the Hydra shotgun being the most powerful, upgraded to the maximum, which fires 12 pellets, inducing 12 X 550 damage.)
The M3 Super 90 is also seen in Biohazard 4D Executer.
A compact variant, the M3S is featured in Resident Evil 3: Nemesis.Pump-Action Shotgun ]], and has the same effect; giving the player +1 Explore. The Riot Shotgun however is more powerful and worth more than its predecessor; having a Gold Cost of 70, an ammo requirement of 60, and deals 45 Damage.