Originally Posted by 883n
When they say it is for multi caliber use, it means in this case the bore is large enough for the 9mm, strong enough for the 300 blackout and can be taken to clean after using with dirty cartridges like the 22lr. Nowhere in that link does it say they have multiple sets of baffles.
This can is wide enough to cover the sights on many 22lr pistols and some 9mm pistols. I'm sure it works very well as far as suppression goes as it has lots more volume than the typical 22lr silencer and nearly as much as some 30 caliber silencers.
The silencer in your link is a good choice for a person who is on a budget and does not need the peak performance expected from a silencer dedicated to a specific cartridge. I have seen 9mm cans used on 22lr guns, they worked nearly as well and were perfectly acceptable as long as the gun used was not something small like the P-22. But on scoped pistols and rifles they are good enough.
seems like a new wipe is all that is needed to make it truly multi caliber..