Serious question, maybe I misunderstand your post: why do you call the numbers devastating?
Pew Science summary says this:
"The HUXWRX FLOW 556k is a relatively compact 5.56mm machine gun rated rifle silencer that exhibits class-leading back pressure reduction and sound signature suppression performance for its size. Its sound suppression performance at the shooter’s ear on the standard MK18 is unprecedented. The silencer is constructed of 3D-printed 17-4 heat treated stainless steel and represents one of the most advanced systems evaluated by PEW Science, to date."