cl_prefer_lefthanded <true|false>
Controls whether your weapon is held in the left or right hand by default. Only takes effect after respawn — use switchhands to swap mid-round.
Examples
cl_prefer_lefthanded false - Starts with right hand after respawn (default).
cl_prefer_lefthanded true - Starts with left hand after respawn.
true and false can also be written as 1 and 0.