Please tell me what you think of my chances

1) Basic demographic info: 30, Male, African American

2) Educational Background: Business major (small crappy school), 3.94 GPA, 640 GMAT score, M.A. in Human relations 4.0 (flagship public school), Currently a matriculating Harvard Law school student ('14)

3) Work experience: Spent 5 yrs in the Army, Promoted 4 times, deployed multiple times. Worked in JAG and managed various offices all over the world, currently interning at V30 Law Firm that mainly handles securities, finance and does corporate work. I love the work but I need a better understanding of it and of management in the civilian sector which has led me down the joint degree MBA/JD path.

4) Extracurriculars: Black law students assoc, Military big brothers, Volunteered over 500hrs at a homeless shelter, member of the United service organization and the Veterans of Foreign Wars. Head of the better opportunity for single soldiers program at my former base and coached two youth sports teams.

5) Short/Long term goals: Work in Corporate/project finance at a New York Law firm, long term I want to start/particpate in a program to get inner city youth, like I was, interested in business and law, hopefully helping to increase the number of Under represented minorities at top MBA or JD programs.

6) Schools: I'm only considering HBS at this point as I'm currently enrolled at HLS and want to do the degree jointly.

Will my low GMAT sink my application. Thanks in advance.

I took the LSAT twice my highest score was 170. I hate the GMAT so much more than the LSAT, but I plan on retaking it in August. I was thinking of taking the GRE instead. Since the rankings are based off of the Gmat do you think submitting a GRE score will increase my chances of admission?