exactly my thoughts
my Witt machine integral suppressed 300 supposed to be mid 110's in db
From their site
Extremely Quiet with little gas blow back typical of other suppressed designs
Short Suppressed length – overall barrel length is 18"
No change in POI or accuracy
User serviceable titanium construction
Unsurpassed Cooling Rate compared to conventional cans
300 Blackout Subs 117Db
300 Blackout Supersonic 124Db
.223 / 5.56 126Db
I think it is worth it to get rid of blast and concussion from any supersonic rifle round, but not everyone will feel that way.
What do you want to do with suppressed 5.56? If you want whisper quiet then it is not worth it. Honestly even suppressed subsonic .300blk from a semi auto isn't that quiet, around 130-135db.
my Witt machine integral suppressed 300 supposed to be mid 110's in db
From their site
Extremely Quiet with little gas blow back typical of other suppressed designs
Short Suppressed length – overall barrel length is 18"
No change in POI or accuracy
User serviceable titanium construction
Unsurpassed Cooling Rate compared to conventional cans
300 Blackout Subs 117Db
300 Blackout Supersonic 124Db
.223 / 5.56 126Db