Battlefield 3 weapon invisible and lag?

I was playing Battlefield 3 and my weapon keeps on disappearing and I keep on lagging, so naturally I turned down the graphics, and I still have the same problem! This wasn't the case a few days ago, but now it suddenly is. How can I fix it?Battlefield 3 weapon invisible and lag?
It could be the server you are playing on or its your PC. Try updating your drivers or reinstalling the entire game (not recommended). Its most likely your PC and internet connection especially if it happens to you on every server. Also if it happens to you in campaign and CO-OP. Best of luck.Battlefield 3 weapon invisible and lag?
it's a know bug. post here to get EA's attention

http://getsatisfaction.com/battlefield3/topics/gun_missing_outer_body_experances?utm_content=topic_link%26amp;utm_medium=email%26amp;utm_source=reply_notificationBattlefield 3 weapon invisible and lag?
may be it because it was the beta. or it was the real game i don't know,or the sever was low.