Factory New Stoeger Model 2000 12ga 28″ﾠ Inside the Stoeger Model 2000 semi-auto shotgun is the Inertia Driven operating system. The Inertia Driven system is the heart of the worlds most prestigious and reliable autoloaders. The Inertia Driven system has only three moving parts in the bolt the inertia spring, the bolt body, and the rotating locking head for more reliable operation. The operating system is mostly contained in the receiver, giving the Model 2000 a trimmer fore-end with better balance. The Stoeger Model 2000 fires everything from 1-1/8 ounce field and target loads to the heaviest 3 waterfowl loads without adjustments. Plus, with no propellant gas venting into the operating system, the Model 2000 stays cleaner. Reliability, versatility, and value make the Model 2000 the ideal semi-auto shotgun.