A sight for a firearm that includes a telescope, with an aiming
point shown in the image. It enlarges the target. Commonly used on
rifles and some long range pistols, may be used with slug
shotguns.
No. The standard sniper rifle for the US was the 1903
Springfield, mounted with a telescopic sight. Later a version of
the M-1 was scope mounted as well. All other nations that had
snipers used their standard infantry rifle mounted with a
telescopic sight.