[exomatt]

The Prometheus 6.03 barrel is a great choice, or the Madbull V2 barrel. If the gun you buy is a clone of the UTG/Maruzen L96, then I'd recommend the PDI hop-up unit that they produce for it. Barrel spacers reduce vibration and movement of the barrel, and are the easiest way to make your gun more accurate, even with stock parts. There are many ways, such as paper-wrapping, or just using electrical tape.