I am assuming you will have graduated with you bachelors or already have?
Typically these sorts of questions don't get answered since this information is very easily found, but most people posting aren't active duty and have more than enough time to sift through the forum for the answers.
With your gpa and military history, you should be a candidate for a number of schools, but your MCAT and personal statements/interviews will determine everything. If you got good grades and really understood the material in your chemistry and physics classes, and you have a good grasp on mendelian genetics, renal system and PTH/calcitonin feedback, and have time to brush up with a Kaplan course, I would say take it now and see how you do. You can always re-take. Shoot for a winter MCAT and then if you don't score a 28 or better, plan to evaluate your weaknesses and do a re-take in June. You will have a better understanding of your weak areas after evaluating scores on your practice tests.
Did you take classes through UMUC by chance? I went to the Mannheim, Germany campus for my first 3 semesters. Just wondering, no real point to that question.