Well, I did get the Kali-Key.
Got me the bundle with the BCG.
It does work as intended, but, for noise purposes, not so much.
Whatever noise it eliminates from the action seems to make up for from the ejection port gas venting.
I am starting to wonder whether the .357 front cap is part of the issue, or maybe I just need to put the can on an actual bolt action with a 16" barrel.