Implants anyone?

ok, this is sort of out there, but alot of other games have similar things, why not put (into new maps, or could patch into old ones) implanted guns. halo has the gun on back of warthog, alot of the james bond games have them. you could put them so they have limited turn, maybe 45 degrees of aim, that way you can manuever around behind to keep them under control, and each team could get one or 2. these could be chain gun type weapons (which some people have been asking for), or grenade launchers (which alot of people have been asking for too). this could be a way to please them and still keep it fair. maybe put just one in the center of the map, or make it a different mode