Bayonet for Arisaka - 75 kills (Arisaka).Aperture Sight for Type 100 - 25 kills (Type 100).Aperture Sight for Thompson - 75 kills (Thompson).Aperture Sight for SVT-40 - 75 kills (SVT-40).Aperture Sight for STG-44 - 75 kills (STG-44).Aperture Sight for PPSh-41 - 25 kills (PPSh-41).Aperture Sight for MP40 - 75 kills (MP40).Aperture Sight for M1A1 Carbine - 75 kills (M1A1 Carbine).Aperture Sight for Gewehr 43 - 75 kills (Gewehr 43).Get a certain number of kills with the weapons listed below for the desired upgrade(s): If you are invited to play a co-op Zombie Mode game it will be unlocked on your profile afterwords. There is a box here and if you have 950 points or more you can buy a random gun - the Ray Gun or the FG42, for example. In Zombie Mode, when you have 1000 points or more, go to the door that says HELP and on the far left.
