The MOSSBERG 590 Tactical Retrograde 12Ga Pump Action Shotgun (52151) is the perfect choice for a personal home defense shotgun with the flexibility and modularity you need. This 590 Tactical is chambered to handle 3" 12 gauge shells with an 18.5" cylinder bore barrel. The receiver design featured positive steel to steel bolt lock-up, dual extractors and an anti-jam elevator. Combine this with dual action bars for smooth operation and flawless performance.