The M18 recoilless rifle was a 57 mm shoulder fired anti-tank recoilless rifle used by the U.S. Army in World War II and the Korean War. Recoilless rifles are capable of firing artillery-type shells at reduced velocities comparable to those of standard cannon, but with greater accuracy than anti-tank weapons that used unguided rockets, and almost entirely without recoil. The M18 was a breech-loaded, single-shot, man-portable, crew-served weapon. It could be used in both anti-tank and anti-personnel roles. The weapon could be both shoulder fired or stabilised using a monopod. The most stable firing position was from the tripod developed for the water-cooled Browning M1917 machine gun.
In Project Reality, the M18 and its Chinese Copy, the Type 36 appear in Project Reality: Normandy and Project Reality: Vietnam in the hands of US(1940) and NVA forces respectively.