Test out the EMP nade emitter against cars. It doesnt disable but does slow them down by 1/2. Emitter time is 15 seconds and a bright flare is visible at the center. Useful in tight areas. Yes you are affected by your own EMP like flashbangs and frags.
Also, since a g3 style weapon hasnt been in the mod for awhile test out the sc2010. The saritch is a scarh replacement, which was balanced to be in between the M4(hk416) and the AK. There is no stock cod4 equivalent. Test the new steadycam for snipers. %30 sway compared to normal but also recoil reduced. Bigger rifles have greater sway/recoil reduction percentages compared to the wa2000 and m21. Standard rifle rounds so they will penetrate.