The M-4 Shuriken Machine Pistol is a submachine gun. A common but effective submachine gun. Fires three-round bursts, and can be pulsed for a higher rate of fire at the expense of accuracy. Very effective against shields and biotic barriers. As kinetic barriers have grown in popularity, so has the popularity of submachine guns. Manufactured by the Elkoss Combine and used by the Alliance of Nations, the Shuriken Machine Pistol has a reputation for being deadly and easy to use, but is weak against armor.