EmuVR just got a new update with light gun support for those of you who've been wanting to play old light gun games in VR. I can try to mirror it and link the setup info if anyone actually wants it.
https://youtu.be/cXqt2J9iJOk
[ Changelog ] 
- Light Gun support.
- New Fall season mode outside, with falling leaves.
- Fix the black screen for PS2 (Play!), 3DS (Citra) and other future cores with FBO hardware rendering.
- New object: candles.
- New setting to opt in for future Easter eggs and random events, spooky or not.
- Allow loading custom retroarch overriders per system.
- Improve performance when rendering lots of SNES cartridges.
- Fix "Rift audio" setting needing a restart to apply.
- Fix shimmering on the window when receiving sun light.
- Fix being able to accidentally grab or push objects while controlling a game.
- It's now easier to set mouse, keyboard (and lightgun) input mode, with semi-automatic device selection.