Most common semi auto 22 pistol kits?

What are the most commonly available slides and lower kits out there for 22 pistols. I liked all the options for parts and models for glocks, but alas I am tired of them and would love to start tinkering with 22 pistols.

EDIT: Thanks everybody! I think might go with a DeAR22! Since I already happen to have a CMMG conversion kit!