I've got one of the .223 cans. Seems as quiet as any of my others. Nice and compact, too. I just leave it on my 20" R5 Remington, so I haven't checked any remove / replace repeatability.
Im with you on that one once I get a thread on suppressor/rifle setup shot in that where it stays. Im even in the process of making a bore guide for the suppressor so I can clean through it and never take it off.
I've got one of the .223 cans. Seems as quiet as any of my others. Nice and compact, too. I just leave it on my 20" R5 Remington, so I haven't checked any remove / replace repeatability.