M110

M110 is a designation used for several unrelated objects and weapons in military and astronomical contexts. Among the more notable usages are a United States military sniper rifle, a celestial dwarf galaxy, and an eight-inch self-propelled howitzer.

The M110 Semi-Automatic Sniper System (SASS) is a 7.62x51mm NATO semi-automatic sniper rifle developed for U.S. armed forces. It was designed to provide rapid follow-up shots with precision at extended ranges and is chambered for standard NATO ammunition. The system typically features a 20-inch match-grade barrel, a detachable 10-round magazine, a modular stock, an optical sight, and a bipod. It was adopted to supplement or replace earlier bolt-action sniper rifles in designated marksman roles and has been used by multiple U.S. services.

Messier 110 (M110) is a dwarf elliptical galaxy near the Andromeda Galaxy (M31) and is a satellite of Andromeda. Classified as a dwarf spheroidal galaxy, it contains predominantly old stars and little to no current star formation. M110 was discovered by Pierre Méchain in 1771 and is listed in the Messier Catalog as the object M110. It can be observed with sufficiently large telescopes from dark skies.

The M110 self-propelled howitzer refers to an eight-inch (203 mm) artillery piece fielded by the United States. As a tracked, self-propelled gun, it provided heavy fire support and was deployed in the mid- to late-20th century before being superseded by newer artillery systems.