This mod will work if you have only SAMP 0.3.7 and SAMPFUNCS. To activate this mod, you have to press Ctrl + X. I've used this before but in an another server. This is an 'advantage over others' mod that disables your skin/character to be stunned by players using Deagles, All kinds of Shotguns, Snipers and other weapons that'll make you stun.
If I were you all, I wouldn't use this.