Biggest problem with the mosquito is the zinc slide.
its not a real sturdy firearm.
I'm surprised that Sig would make something like that, especially for the cash they sell for.
I have known about 5 guys who have had them, and in every case they have dumped it for another 22 later.
also, the Sig barrel is unsuitable for threading for a suppressor. its been done, but its not sturdy.
make sure you use round nose high velocity ammo in it for the least problems, and try a dry lube, 22s get messy fast.
the sheetah is nice for sure, I have a cheetah, but mines 22LR, and I got it threaded for my 22 suppressor.