For owners of the Carbon8 Stiker-9 CO2 Blowback pistol, they can upgrade the inner barrel with the PDI Wide Bore 6.1+ Inner Barrel which has a length of 97mm. The CS barrel is a more affordable alternative to their premium SUS barrels. It boasts the largest inner diameter within the CS inner barrel range. While the FPS is lower compared to RAVEN and DELTA, it offers improved flight stability.