@ DM- That would be true on the M9, but he's asking about the CSAR-T (and similar) and I presume others with that same dot-dash-dot hole configuration on the spine.
I have a CSAR-T and had no idea that was the purpose of that hole config. If anyone knows, I'd be interested in finding out as well. I thought the holes were intended for opening oxygen tanks and that the wire-cutting was just a rumor or potential use.
Unfortunately, the holes in my CSAR-T don't fit a typical oxy or other air tank. The holes on my other TOPS knife are larger and do operate the valve on an oxy tank.
I dunno...