Unfortunately, Sig doesn't even make the Mosquito. More and more 22s are being made by other companies, and then they stamp the name on the gun that is selling it. The 22 caliber 1911s are really running away with this concept.
Buckmark, Ruger and 1 or 2 others are probably the best 22s. I hope you can get yours to work, as I have seen so many negative reviews about them