The SR-25 (Stoner Rifle-25) is a semi-automatic sniper rifle manufactured by Knight's Armament Company that chambers the 7.62x51mm NATO round. It was designed by Eugene Stoner, who also designed the AR-10 rifle and its successor, the AR-15.
There is another variant of the SR-25 that appears in the Rainbow Six universe.
The SR-25 is categorized as a sniper rifle and marksman rifle in the Rainbow Six universe.
The SR-25 is a relatively subpar Marksman Rifle. It outputs a moderate single-shot damage of 61, comparable to that of the Mk 14 EBR. However, unlike the Mk 14, the SR-25 suffers from a steep damage dropoff. While manageable, the SR-25's vertical and horizontal recoil are noticeably inferior to other Marksman Rifles. Its also comes with the slowest full and tactical reload speeds of all DMRs.
Like other DMRs, the SR-25 can breach hatches and barricades with only a few shots, only 7-10 bullets being required in most cases. Equipping Blackbeard's Rifle Shield gadget significantly reduces the SR-25's ADS speed.