[tbone833]

Are there supposed to be orings on the ultralite barrel? Mine does not have at either the middle or the back.

[speedy2k4]

There should be an o-ring on the barrel tip where it screws in to the back.

Putting one on the back is optional, but helps prevent the barrel from vibrating loose or cracking the eye pipe.

[WMine]

I put two on my UL back cause with one it still comes really close to the eye pipe. I'm not sure why DYE doesn't include one on the back because without one the barrel will crack the pipe.