Place the empty vest inside the backpack, put the 75 rnd mag inside the vest already in the backpack and load the AKM with a 30 rnd mag, after having done so rotate the mouse wheel and select the option, load 75 rnd mag , appears in his AKM one 75 rnd mag and vest will be another equal but not functional for the two become functional, exit the server and login again, you will have doubled your mags and rounds