H&K USP Compact 10 Round Magazines for VP9/P30
If you live in California, you are stuck with 10 round magazines. However, if you are short a supply of magazines for your handgun because stock just isn't there (or want to be cheap). Get USPc magazines (10 rounders) and modify them like I did.
If you live in a free state and are laughing at this, I hate you. :)