No, I don't have one. But the fed who was at Bill's North Friday did. I was trying out my Ciener.22 conversion with my new Black Dog magazines (works like a charm, let me tell you), when I started hearing -thump thump thump from a couple of lanes over.
I stuck my head around the divider and watched a Federal Conservation Officer sighting in his suppressed AR. The can was a lot shorter than I expected, maybe eight inches. Pretty cool, though, and the first one I've ever heard/seen in person. Attracted some attention on the range for sure.