Hey, guys. If you guys haven't noticed, ijji has created a new event for A.V.A. It's like one of the Soldier Front events I participated in before. Where you could win a Golden_UZI. You got to play a certain time or game to win stamps and you'll win a prize if you collect a certain number of stamps.
Anyway, the prizes are:

5 stamps = Camo Skull Mask (7 days)
10 stamps = Camo Skull Mask (7 days)
14 stamps = Get a chance to win the L2A3!

Or check the forums for more information:
Skull Camo Event!

Just letting you guys know. Have fun.