accuracy lua files

Anyone know how to change the accuracy of any weapon? I've tried to change the file called eu_weapon.x7 by setting accuracy on 0 but it didn't work.I'm also trying to change lua files like weapon_submachine (I've already decompiled it) but i don't know what to do.

in ressource ->script->use the "weapon_**" lua files. there is sometimes "0.5..." change it to 1 or so.

it doesn't work,s4 crash when i try to fire.