Hey mate, if you want realistic tanks download the Adversary Tank patch and T-80 Tank Patch from Sigma-6. His website is
www.operationnorthstar.com It's awesome, not only loads of new vehicles, but realistics load outs and weapon damage. His T-90, T-80UM, T-72BM, Type-98 can all seriously disable an M1A2 with one round of APFSDS-DU, and can kill it for good with one more. M1A2s are slightly stronger and usualy kill you with one round, but as you can see it's far more realistic. Many of the later model Russian and Chinese tanks (like the ones I just mentioned) also carry ATGW like the 'Refleks' which is great for taking out choppers. Best OFP Mods I've seen yet.
In total it gives you an extra four types of T-80, four types of T-72, two M-84s, one T-90 and one Type98.