I have one for two of my 22 pistols. It took 12 months for the stamp to come back.
Yeah, at the Tanner Gun Show last weekend, I picked a few brains at several of the tables, got some business cards, shook hands and sucked up as much data as I could on this subject.
I’m really looking at the Osprey suppressor for my .45s, but can’t find any threaded barrels for the XDs. Found plenty available for my Beretta 92FS, though.