Got my filter taken care of.
All of the USCA nationals stages that involved a pistol/carbine change-over had a dump point.
In the stage 5 videos, you can see it at the end of the "hallway".
Now, there is a bit of an error in that the dump point could only be used if the shooter finished at that port (not dictated by the stage description or rules), so if the shooter finished on a closer port, they would have had to holster.
Easy fix to that is that there should have been another dump-point.