AK-47 Silver causing game freeze when a room loads

I have tried 2 weapons so far in Zombie mode , my Kriss and my Scarlight, both are good but i kill faster with the Scarlight, now i got out my AK-47 Silver with a +5 clip and the game freezes at about 80% load.

If i log back on and use either of the other weapons , no problem . i haven`t tried my M4A1 Silver yet ,I will update on that .

I don`t have any gold weapons to test this glitch ,Is anyone with a gold weapon having the same problem ?