Rifle Grenade for M1 Garand - 100 kills (M1 Garand).

Rifle Grenade for Kar98K - 150 kills (Kar98K).

Rifle Grenade for Gewehr 43 - 150 kills (Gewehr 43).

Rifle Grenade for Arisaka - 150 kills (Arisaka).

Grip for M1897 Trench Gun - 25 kills (M1897 Trench Gun).

Grip for Double Barreled Shotgun - 25 kills (Double Barreled Shotgun).

Flash Hider for SVT-40 - 25 kills (SVT-40).

Flash Hider for STG-44 - 25 kills (STG-44).

Flash Hider for M1A1 Carbine - 25 kills (M1A1 Carbine).

Flash Hider for M1 Garand - 25 kills (M1 Garand).

Extended Clip for Type 100 - 25 kills (Type 100).

Dual Magazines for MP40 - 150 kills (MP40).

Box Magazine for M1A1 Carbine - 150 kills (M1A1 Carbine).

Bipod for Browning M1919 - 25 kills (Browning M1919).

Bayonet for Type 99 - 75 kills (Type 99).

Bayonet for Springfield - 25 kills (Springfield).

Bayonet for Mosin-Nagant - 75 kills (Mosin-Nagant).

Bayonet for M1A1 Carbine - 100 kills (M1A1 Carbine).

Bayonet for M1897 Trench Gun - 75 kills (M1897 Trench Gun).Bayonet for M1 Garand - 75 kills (M1 Garand).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. At the Prestige levels below you unlock the following classes:

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