hud_fastswitch <true|false>
If true, swaps weapons instantly when pressing a slot number — no on-screen weapon selection menu in the way.
Examples
hud_fastswitch true - Pressing 1, 2, 3… switches weapons immediately.
hud_fastswitch false - Shows the weapon selection HUD; press the number again or fire to confirm.
true and false can also be written as 1 and 0.