Can anyone help please i'm looking to upgrade the inner barrel and hop-up on my We Katana Raptor.it is standard at the min other than having a madbull M110 spring in it thank you for your help.
6.03mm Prometheus 318mm or 363mm barrel, the OE is 350mm. I'd go with the 363 and have it poke into the flash hider a bit. Or if money isn't an issue then a PDI 6.05mm barrel at 350mm custom cut length.