if you be on a budget: Lucky Unitech kit FTW, they are cheap, lightweight, accurate, look cool and come in lots of sizes and colours.
if you be sitting on gold bars: Sly dual carbon fber barrel kit. simply awesome, really really light, very accurate, and it cleans out any barrel breaks you get within two or three shots. Sadly, only on sale in the USA, and very expensive, so you've got to have lots of cash for it.