i got second rank , got unlock and i pressed unlock later button
now i cant unlock weapon , can you help me please

how can i unlock weapon now ?

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amd 64 3000 + (2400 mhz , 240 x 10)
asus k8 n
2 x 512 mb kingmax hardcore (480 mhz)
120 gb maxtor
80 gb seagate baracuda
asus x 850 xt 256 mb agp