A sniper is a military/paramilitary marksman who engages targets from positions of concealment or at distances exceeding the target's detection capabilities. Snipers generally have specialized training and are equipped with telescopic sights. Modern snipers use high-precision rifles and high-magnification optics. They often also serve as scouts/observers feeding tactical information back to their units or command headquarters.
French and British (center) snipers equipped with FR F2, Accuracy International AWM and PGM Hécate II rifles (left to right, 2012) and camouflage Ghillie suits
Vasily Zaytsev, left, and other Soviet snipers equipped with Mosin–Nagant M1891/30 during the Battle of Stalingrad in December 1942
A modern sniper weapon system which consists of a sniper rifle (here Barak HTR 2000 chambered in .338 Lapua Magnum), telescopic sight (Leupold Mark IV x10), and additional optics
Over-watch being provided by an army sergeant during a high-level meeting, Baghdad, Iraq
A marksman is a person who is skilled in precision shooting. In modern military usage this typically refers to the use of projectile weapons such as an accurized scoped long gun such as designated marksman rifle to shoot at high-value targets at longer-than-usual ranges.
An American marksman looks for enemy activity along the hilltops near Dur Baba District, Afghanistan (2006)
A soldier with a G28 of the German Army
Marksmen competing in Australia
A British soldier aims on a shooting range in Iraq, 29 July 2006.