hud_fastswitch

hud_fastswitch is a console variable available in all Source games. This command is used to enable and disable fast weapon switching, this command also have options to switch between console-styled or horizontal scrolling HUD for selecting weapons.

hud_fastswitch 0 (default setting)

hud_fastswitch 2 - This will be enabled when gamepad/controller support is enabled in mouse settings.

hud_fastswitch 3 in Half-Life 2.

If true/set to 1, disable the weapon menu on the top of the HUD, and switch directly to a weapon without waiting for +attack (default MOUSE1/ left click) "confirmation".

If set to 2, console weapon selection HUD is used, weapon will be also switched directly.

If set to 3, horizontal scrolling weapon selection HUD is used (default on Postal III), just like 1 and 2, you will be switched to a weapon directly.