You seem to be obsessed that your way is the only way. The OP is shooting a 6 ARC suppressed rifle and didn't say what he wants to use it for. But a short fat barrel has many limitations.
a 16" 6 ARC makes no sense, you need barrel length to get velocity and there are reasons people shooting for distance seek velocity. Even if not shooting for distance velocity bucks wind. He already says he shoots suppressed.
Posting an unverified cherry-picked target on the internet means nothing. There is no evidence if you look across a wide selection of people winning a wide variety of contests that shorter unthreaded barrels are more accurate. Why doesn't short and fat dominate in F-Class, Palma, Service Rifle, small bore, silhouette, PRS, USPSA, IDPA, High Power Rifle or even 3-gun events?
This is from Camp Perry Nationals.
View attachment 8586597
This is from Precision AR