The Ithaca Model 37 shotgun is the longest continuously-produced shotgun in U.S. history. It was based on a competitor's previous design in 1933 and was introduced in 1937 and has been manufactured continuously until this day. It is popular with sport shooters as well as home defense and police and military. Soldiers in wars after World War II have opted to carry it as a short range weapon in the field. It was popular among soldiers and elite units in Vietnam, usually for the man on point, since it was a sound design and very robust.
Most police offices in the series use this gun.