I have a 98 in 177, and am pleased with it. I was just reading some spiel on a website called Pellpax, and they state the following:

The barrel is over sleeved with a strong metal tube which features baffles inside to reduce the muzzle report

Is that the case? When you look at the end of the barrel you can see the crown finishes flush with the end of the sleeve- so how can it benefit from any baffles?

Baffled!