There is a delay after using X-Ray before shooting, but the shot cannot be buffered, as it instantly despawns. Grapple can bypass this cooldown.

Requires:

"h_heatedGMode",
{"or": [
  {"heatFrames": 70},
  {"and": [
    "canUseGrapple",
    {"heatFrames": 40}
  ]}
]}