Many advanced features are standard, and others can easily be added.
The standard features on the Viper-M1 are costly upgrades for many other markers. The range of factory accessories available enables the Viper M1 to be customized without costly shop modifications. Feature List Blowback Power Feed - provides jam free feeding of the paintballs, even at high rates of fire. There are no threads to strip or damege like screw mounted power feeds. The power feed and body are joined into one solid piece of metal.