The Resonator K is on sale right now and is closer size wise to what I want. My only issue is that YHM’s specs list it as really close to the effectiveness of the full size Resonator on a 20” 308 but way louder on a 5.56. Misprint? Lack of a 22cal end cap?

I could wait for the full size to come back in stock if the end caps make that much difference.