With your current stats, your chances are marginal. If you have distinguished yourself in your research and have letters that say you are "in the top 5% of student researchers I have had in my lab", you should get some interviews and quite possibly an acceptance or two. If you can hit 510 on the MCAT, MD admissions committees will relax a bit over you hurting the average MCAT score (this is a thing in most med schools) and you should get more interviews and acceptances. Some MD-PhD programs are given a free rein over admissions, and they tend to be less MCAT sensitive.