Due to its vastly superior stopping power compared to the 5.56 NATO, the .300 Win Mag sniper rifle was one of the few that Chris Kyle would shoot. It's an excellent all-around cartridge whose performance allows for superb accuracy as well as stopping power. EuroOptic offers .300 Win Mag sniper rifles from Barrett, Christensen Arms, and Remington Defense.
Selecting a sniper rifle chambered in .300 Win Mag can be daunting because of the number of options, but using the filters (left side of screen for desktop users, "Refine Your Selection" for mobile users) will allow you to narrow down the field by manufacturer, action, barrel length and more. Most sniper rifles use a bolt or direct impingement gas system.