All you can really do is try to decrease loss of pressure in each shot. A barrel wouldn't help anything, unless you have a bad paint/barrel match. IDK what would help with the pressure, but maybe a bolt and a reg. Do you use air or CO2?
But if all you want is distance, then you could get a spyder to tippmann barrel adapter, and go buy a flatline. The shroud would be useless, but hey... you want the distance .
He's talking about high pressure air (HPA), or nitro (N2), or compressed air (CA), whatever you want to call it. Actually HPA is easier on the gun because it's more stable. Since Co2 is a liquid in the tank, it has to expand into a gas to propel the paintballs and power your gun. Since it expands at different rates at different tempatures, and due to the fact liquid Co2 can get into the gun and damage o-rings, Co2 is much harder on any gun. So, yes, your gun will run on HPA with no modification other than possibly a new mainspring.