Justin:
Welcome to the Forum.
I would advise getting two spare magazines, for a total of four. That assumes you will be carrying a spare mag with the Rohrbaugh. If so, also order a magazine case. And then, I would recommend that you plan to change your magazines according to a certain schedule. Some recommend switching them out when you change your clocks -- i.e. twice a year. I tend to be obsessive/compulsive on the subject. Back in my Army days, I was told by an old armorer to give magazines a 30-day duty schedule. I still do that, even though metalurgy and spring technology are far advanced today from what they were back in the 1960s.
Good luck with your "pocket rocket." This little pistol is a masterpiece of design and function.
RS