What are some of the features of the Viper-M1?
3.1 Specifications • Caliber – 0.68 • Action – Blowback Semi-Automatic • Feed System – Power feed • Feed tube size – 7/8″ • Safety – Standard Cross-block • Barrel length – 9″ (6″ and 12″ also available) • Barrel release – 1/4 turn quick release • Grip – Lonestar M-16 style • Length with standard barrel – 17-1/2″ • Weight – 2-3/4 lbs 3.2 The Mag Chamber One of the features I really like about the Viper-M1 is the very stable velocity – even on straight CO2. When my wife Dawn played in the Zap Amateur Open, the velocity stability was so solid that the chrono ref was pointing it out to people. In my experience, I’ve been running less than +/- 3 fps. I think one of the main reasons for this stability is the Mag Chamber, the expansion chamber that is integrated into the Viper-M1’s receiver. A lot of people view an expansion chamber as providing “room for CO2 to expand”. I’ve never really understood that explanation, as the pressure on a gas is dependent on its temperature, more than anything
