Help!!!Dye barrel to fit dye back on ion (.684)?

[haz2977]

ive just purchased a dye ultra lite back for my smart parts ion. i fitted it to the marker and reaslised i need a barrel that will screw into the dye back. dont know what thread it is as the thread on the barrel end is a finer thread than the ion thread. it says .684 on the marker end if that means anything. (New to the sport)
any help would be very much appretiated!!!.

 

[Mclovin101]

You need a UL tip mate. Most places sell them.

 

[haz2977]

ok brilliant, thanks mate