What shall i do with almost 70K GP ?

Hi all ! I am Staff sergeant class 4 .... same as the Scar L and XM8 rank ... and i got 70k GP , but i dont know what to do with them , can someone tell me which weapon is good , if u know pls say if high dmg or not or ... ye more stuffs..... BTW , i already got AWM and m16 ( soon broken ) and m700 ( not soon broken )
THANKS !

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