The Hammerli 850 AirMagnum Combo is a factory two-barrel package — a single 850 action shipped with both a .177 and a .22 caliber barrel, each with a caliber-specific 8-shot rotary magazine. The barrel swap is tool-free on the 850 platform. The Combo package provides both calibers at lower total cost than purchasing two complete rifles, demonstrating the Hammerli platform's practical versatility. Type: Rifle Action: CO2 Semi-Automatic Caliber: 177 Capacity: 8 Year introduced: 2008, Switzerland Weight: 89.6 oz Overall length: 41.3" Status: Active Intended use: plinking, training, pest_control