“And, it can be suppressed to almost silent.”
All you hear is the wailing of the widows in the morning.
My suppressor cuts the noise down on a loud 22LR to the level of what I get out of an Aguila primer-only load I practice with in my S&W revolver. It’s not silent by any means.
Now the ones in the pictures in the OP are probably a lot quieter because they’re integrated with the barrel and probably have a lot more baffles.
Conan! What is best in life?