Sgt Grit Customer Service Contact Info. Sgt Grit P.O. Box 8300 Little Rock, AR 72222. Telephone Number: +1 (888) 668-1775. Does Sgt Grit Do Black Friday? Yes, we are eagerly waiting for the Sgt Grit Black Friday Deals that will start on Fri Nov 27 2020 with many items available in the discounted Black Friday sale. Does Sgt Grit Do Cyber Monday?