Half-Life how to hide your gun

While in-game, open up the developer's console (using the ~ key) and type

cl_drawweapon 0

If you want to bring your gun back, type in
cl_drawweapon 1






If you would like to be holstering and unholstering your weapon constantly, you could type in
bind 0 "cl_drawweapon 0"
bind 9 "cl_drawweapon 1"


Now you can hit 0 to hide your weapon and 9 to show your weapon. This doesn't play the animation, however (Bummer)