Yo need to find nz1 kf file and handani file,and after that backup those files and rename it to knife.kf(original knife handstyle to nz1 handstyle),remember to also chang the handani file to knife.?? ,remember to backup your original file so that u can chg it back if it has problem
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https://www.mpgh.net/forum/showthread.php?t=1047768
there is a file that chnges knife to nz1 style