Mini-14 Stainless Factory Folder; I know, it's not a handgun. But I didn't see a specification for handguns in the thread title, and I haven't seen a Ruger rifle thread anywhere for pics.
And hey, with the stock folded, it's shorter like a handgun, no?
CA legal - stated before any of the "HEY! THAT'S ILLEGAL" busy-bodies chime in.