nothing really special besides the deviation is removed to make the gun more accurate, especially the machine guns in the Support class. Overheating removed, faster velocity for missiles/grenade launchers, increased damage, increased blast radius, more magazines...
simply paste the Weapons folder to the Objects_client.zip, Objects_server.zip (Backup both of these is recommended before installing this mod). The Reloading sound, trigger click for the Heavy machine guns are from Project Reality.
完美
where is objects_client.zip located
[Installation folder] > mods > bf2 > Objects_client.zip