Weapons from other games you'd wish too see in PS2

I personally would like to see more ES-style weapons that, even if they are almost the dead same in terms of stats (TR has bigger magazine, NC more damage, VS quicker reload and faster projectile speed), in the category of dealing solely with air. Make one like a flak air cannon or something, low-threat when in small numbers but high in larger concentrations.

Also, give us some ES-flavored love for the NS vehicles, like perhaps unique armaments per faction.