I am selling my HK marked Benelli M3 12GA shotgun. This is the model that allows you to select between semi-auto and pump action. This is a great shotgun, only selling to fund another project. This gun is setup for tactical/defense. 20" barrel, extended mag tube (9 rounds capacity). Aftermarket accessories on the gun include: Meprolight ghost ring night sights GGG tactical charging handle GGG single point sling mount GGG sling Tacstar side saddle Here is a general description: The Benelli M3 (Super 90) is a dual-mode (both pump-action and semi-automatic) shotgun designed and manufactured by Italian firearms manufacturer Benelli. The M3 holds a maximum of seven rounds and uses the proprietary Benelli semi-automatic system first showcased in the M1. The M3 is notable for allowing the user the choice of semi-automatic or pump-action operation. It is reliable and versatile, and popular with both police forces and civilian sportsmen. Pump-action operation is employed when shooting less powerful shellssuch as rubber bulletsthat do not generate enough recoil to operate the semi-automatic mechanism. Conversely, the semi-automatic mode can be employed with more powerful shells, absorbing some of the recoil. Switching between the two modes is done by manipulating the ring located at the front of the forend grip. The Benelli M3 also features a removable stock allowing the user to choose one of two styles, the traditional shotgun stock or a stock with a pistol grip. The Benelli M3 is an updated version of the Benelli M1 shotgun. The M3 uses the same inertia recoil semi-automatic system as the earlier Benelli M1, but adds another Benelli-patented feature, which allows 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. An underbarrel tubular magazine usually holds 8 rounds for police or military versions, or less in some civilian models.