The development of the Dragunov designated marksman’s rifle was spurred by the NATO adoption of the 7.62x51mm cartridge. The Red Army had standardized on a new suite of infantry weapons using the intermediate-sized 7.62x39mm round, and feared being out-ranged in open terrain by NATO units. The Soviet squad needed some way to reach out and engage a NATO machine gun or antitank weapon that might be beyond the range of their RPD light machine gun. And so in 1957, specifications were issued for a new 7.62x54Rmm precision rifle.

Three designers responded with proposals; Dragunov, Konstatinov, and Simonov. The Simonov was not really suitable (it was ascaled-up SKS in essence), and the Konstantinov was not as accurate as the Dragunov. And so, Evgeniy Dragunov’s rifle was adopted in 1963 as the SVD. Dragunov himself was a talented competitive marksman, and this experience undoubtedly contributed to the quality of hhis design. The SVD is a rotating bolt rifle with a lightweight short-stroke gas piston and a light-be-accurate barrel. It was issued to ever squad in mechanized infantry units, and was an important part of infantry armament, still in service today.

Video on detail differences between SVD, Tiger, and NDM-86:
https://forgottenweapons.vhx.tv/videos/dragunov-variations-military-svd-izhmash-tiger-chinese-ndm-86

Video interview with Max Popenker on Dragunov history:
https://forgottenweapons.vhx.tv/videos/history-of-the-svd-dragunov-with-max-popenker