Benelli M1, but with addition of the another Benelli patented feature, which allows to the shooter to lock the semi-automatic action and switch to the manually operated pump-action mode and back in the matter of seconds. The action type switch is located at the forward end of the forearm, and is formed as an annular knurled ring. Rotation of this ring either engages the action rods of the pump system and locks the semi-automatic recoil system, or disengages the action bars, locks the forearm and allows the inertia recoil system to operate the action automatically. This greatly improves the versatility of the shotgun, allowing it to fire low-powered ammunition (mostly of special purpose, such as less-lethal rubber or tear-gas projectiles) in the manually operated pump action mode, and to fire full power combat loads with slugs or buckshot in rapid semi-automatic mode.
nUnderbarrel tubular magazine usually holds 8 rounds for police or military versions, or less in some civilian models.
M3 Super 90 is available with various barrel lengths and stock options, with fixed butt and semi-pistol or pistol grips, or with top-folding butts and pistol grips. Sight options include shotgun-type open sights, rifle type open sights, ghost ring (diopter) sights and various mounts for red dot or low magnification telescope sights and tactical flashlights and laser pointers.
M3 is a high quality, very versatile shotgun, and is very popular as a police weapon, and as a civilian weapon for self defense and sporting purposes (IPSC shotgun)