The preferred submachine gun of counter-terrorist operatives around the world, Heckler & Koch's MP5 is known for its reliability and accuracy, even when firing on full automatic. This weapon is now available in .40 S&W(MP5/40) as well as 10mm Auto(MP5/10), although RAINBOW uses the 9mm MP5A2 fitted with single, triple, and full-auto trigger group. These weapons are incredible stealthy when fitted with a sound suppressor.