SR-25

The SR-25, short for Stoner Rifle-25, is a designated marksman rifle and semi-automatic sniper rifle designed by Eugene Stoner and manufactured by Knight's Armament Company. It uses a rotating bolt and Stoner's gas-operated piston system, loosely based on Stoner's earlier AR-10 chambered in 7.62x51mm NATO, and about 60 percent of its parts are interchangeable with the AR-15 and M16 rifle family. Early rifles were built by Remington Arms with 5R rifling and a free floating barrel attached through the front receiver's handguard. It was designed in the early 1990s and has been in production and in service since 1990. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/