the shot while reloading bug is not a real bug
you can see him reloading but in truth he is not reloading
there are several map bugs, where you can see through walls
on almost every map especially on halong and nva base
furthermore there is a bug to be invisible on every map(tested it on nva and halong):
if you join server do not select a team
then another player has to throw a nade on this place where you are in this modus...
if this nade explode on your place, you are "death" and can join the server invisible and unbeatable
have fun
Tr@sko