Thanks for the help everyone! Just as an update, I have a new outer barrel coming in (neither the v1, nor the v2. It has room for a thread adapter on the interior of the outer barrel, like my vsr does). I also seemed to have found a maple leaf bucking that is compatible with kjw guns on its way, so hopefully that's the right one and gives a good air seal.
Has anyone had any luck with removing a glued outer barrel? it would be really nice to salvage this inner barrel (I could use the extra back pressure for those winter games)
I've also included another couple photos showing the attachment point of the inner and outer barrels.
https://imgur.com/a/jCadi