I purchased 4 NDZ aluminum magazine base plates (red with my name stenciled on the bottom) for my 10 round magazines for $21.95 each. I received them in the mail 3 days later. They were easy to install and now my 10 round magazines have the same grip surface as my 12 round magazines (NJ only allows 10 round magazines). I'm impressed so far. Will shoot with them this weekend to see how they do.