Light, slender, and quick-pointing never described a semi-auto better than the Benelli Montefeltro 20-gauge and 12-gauge shotgun. All variations of the Montefeltro utilize Benelli's renowned Inertia Driven System. This extremely reliable action is composed of just 3 main parts – the bolt body, inertia spring, and rotating bolt head – and harnesses the inertia of recoil to cycle the next round. This simple, yet robust system eliminates the need to make adjustments, and is able to handle the lightest field loads to heavy magnum shells.