You can drop any of the following (provided the server admin has allowed it):
weapon, ammo, flag, persistent, powerup, holdable
To select which to drop, simply add the name above to the end of your drop
command.
For example, to drop a weapon, simply type
/drop weapon
in the console.  Or bind a key to 'drop weapon' for quick access.
When dropping weapon/ammo, the type dropped corresponds to your
currently-selected weapon.
