The Sniper Rifle is a weapon in Codename Eagle.
The Sniper Rifle is first encountered in the third mission "Assassin", where Mortar leaves it for Red inside the house where you start off. The Sniper allows Red to kill Russian soldiers at a distance without other soldiers pinpointing his location, thus adding the ability for a stealthier, safer approach.
The Sniper is provided in both bases.
The Sniper Rifle can be zoomed in by pressing the 4 key. This doesn't affect your movement or aim. After firing each shot, the player performs a reload animation - composed of putting away and taking out the weapon - thus making a slow rate of fire.
The Mauser Karabiner 98K was made in 1930's Nazi Germany - which didn't, and wouldn't have existed in the Codename Eagle timeline.