The Viper series is Tristar's premier flagship shotgun and features a self-loading, gas-operated action allowing for fast follow up shots along with widespread compatibility with different loads. The new G3 edition features fiber optic sights, ventilated ribs and 3-inch chambers for better compatibility with a wider range of shells. The barrel is compatible with Mobil-pattern chokes. This model is chambered in 20 Gauge and features all-black synthetic furniture, an all-black receiver finish, 28-inch barrel, and a 4-round magazine capacity. Three choke tubes are included with each shotgun (IC, M, F).