An "OK" Solution
I used these to mount Element E100 fire extinguishers and my Surefire Lawman as this is the smallest "round" mount available. It's too big for all of those things unfortunately. I hung the Surefire in it vertically and put it around the larger side of the extinguishers, but not ideal. Hard to get it tight enough to not rotate, the screw went through the plastic countersink after initial mount and a location move, this piece needs to be metal. A smaller round mount would be great and a metal countersink.