Benelli M1 Super 90
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The Benelli M1 (Super 90) is a semi-automatic shotgun manufactured by Benelli Armi S.P.A.. It is available in several versions for civilian, law enforcement and military use. It features the proprietary Benelli recoil system, known for its reliability and easy maintenance. The standard model features an aluminum alloy receiver and tubular magazine, and is available with a standard or pistol grip stocks. The M1 Super 90 can be fitted with traditional iron sights, or ghost ring diopter sights. Mounts are available for laser pointers and tactical flashlights. Due to the inertia recoil system, the M1 needs heavier loads to cycle properly.
Action
The Benelli M1 semi-automatic shotgun based on the proprietary Benelli system, which utilizes the gun recoil and inertia of the moving parts to operate the action. This system was developed by Benelli by the mid-1980s, and is both simple and reliable in operation. The system utilizes the rotating bolt head with two locking lugs that lock into the barrel extension.
The inertia spring, pressing on the both bolt body and head, holds the head in the forward position relative to the body. When gun is fired, it recoils and moves back slightly against the shoulder of the shooter. Due to the inertia of the bolt body, it resists the initial recoil movement, so the bolt head, locked rigidly with the barrel and the rest of the gun, moves back relative to the bolt body, compressing the inertia spring and rotating itself to unlock, due to the head locking pin being engaged in the cam slot in the bolt body.
As soon as the rotation of the head is enough to unlock the bolt head from the barrel, the residual pressure of the barrel pushes the bolt head back, and this, in turn, pushes the bolt body against the recoil spring, overcoming the bolt body inertia and commencing the reloading cycle (ejecting the spent case, and feeding and chambering the fresh round). As soon as the bolt group returns into the battery, the pressure of the compressed inertia spring pushes the bolt body slightly back against the bolt head, causing the bolt head to rotate and lock into the barrel. The gun is now ready for the next shot.
While this sounds quite complicated, but the whole system is mechanically very simple and has few moving parts, resulting in high reliability and easy production and maintenance.
The Benelli M1 shotgun is no more than the system described above, built inside the aluminum alloy receiver and mated with conventional underbarrel tube magazine and polymer stock, which is available with semi-pistol or pistol grip. Sights options are traditional shotgun sights, rifle type open sights or ghost-ring (diopter) sights. Mounts for laser pointers, tactical flashlights and red dot scopes also available on the market.
Overall, the Benelli M1 is a high-quality shotgun, available in numerous versions for both civilian, law enforcement and military use.
References
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