I like to post about guns that are friendly to southpaws, partly for my own reference and partly because other lefties may be interested (how many lefties read this blog, I wonder). The vast majority of these I don't own and have never handled, so I can't comment on them. I just provide the information. Here's another pair that I just learned of: The H&K P2000 and P2000SK. At a cursory scan of their website, it looks like just about all of their handguns have an ambidextrous magazine release. However, these two models also have an ambidextrous slide release. The SK model is the more compact, and is available in 9mm, .40 S&W, and .357 Sig.