Here are some sounds from the original Ghost Recon, Navy Seals mod V.2 and The Spetznaz mod. Mostly modern western or russian small-arms & machineguns (generally 1 shot, tri-burst or full auto wavs), and a couple of tank sounds, T-72 atleast.
I used the M-16 tri-burst & a command shout for my modern infantry.. think it works nice