High quality inner barrel.Its inner diameter is 6.08mm This is new concep. Made of Stainless steel. It's not so tight, This barrel keeps libration after trigger release low, and it rise up accuracy. 　The tolerance is ±0.002mm 05 inner barrels are producted by using the Cold hammering(This tolerance is the highest quality in our industry). But it's impossible to product the internal diameter 6.01mm.We needed more accuracy. So we reaquired more precise scale.

08 barrel has a larger bore than any other tight barrel ,so less pressure & ball speed is not high. But 08 Barrel has a stable air flow as below.BB will get the air stream,so it makes more fly & straight ballistic.