Crosshair:

cl_crosshair_drawoutline 0;cl_crosshaircolor 1;cl_crosshairdot 0;cl_crosshairgap -2.5;cl_crosshairsize 1.5;cl_crosshairstyle 4;cl_crosshairthickness 0.9

Binds:

bind mwheelup+jump
bind mwheeldown+jump