if (CLIENT) then return; end;

local HookName = "WeaponSwitch.Delay"
local DelayTime = 3;

hook.Add("PlayerSwitchWeapon", HookName, function(ply, oldWeapon, newWeapon)
    ply.WeaponSwitchDelay = ply.WeaponSwitchDelay or 0;
    if (ply.WeaponSwitchDelay > CurTime()) then
        return true;
    end
    ply.WeaponSwitchDelay = CurTime() + DelayTime;
end);