Mares Viper Pro w/bungee The Viper Pro and Viper sling guns are characterized by excellent quality construction; paired with innovative technical solutions that make it possible to guarantee great precision, power, maximum rigidity, and manageability. Optional swiveling band fork adapter, for traditional dual slings. Stainless steel release mechanism in a reversed position, manufactured in stainless steel with high-precision laser cut parts. Adjustable trigger sensitivity, and on Viper Pro the distance between the trigger and the handle can be customized. Stainless steel side line-releaser and two lateral alligator clips. Speed ø 6.5-mm tahitian shaft, S-Power Speed ø 19-mm circular sling, and Vertical Spiro 65 reel on Venom Pro 90 and 75, Vertical Spiro 87 on Viper Pro 100 and 110-cm. Viper Pro is available in 75, 90, 100 and 110-cm lengths.