The Waldo 511 is a primary weapon for the Stealth class in Blitz Brigade. It is based on the British Welrod bolt-action suppressed pistol. This gun is very popular due to its high damage and is very effective when it comes to headshots and crits, which will easily one-shot Gunners. Unfortunately, the weapon is dragged down when it comes to its low rate of fire, which makes the Heisenberg 9 a better weapon when it comes to fire rate. It's likely that the weapon name is a reference to the famous character, Waldo.