The Chinese clone of the Russian SVD Dragunov. They were sold in the U.S for a short while and in two calibers; 7.62x54R and 7.62x51mm. The optic installed on the rifle is the massive Russian 1P21 Minuta, whereas the factory supplied optic is in the green transit case. The NDM never came with a recoil pad or bakelie bayonets; most likely add-ons by the owner.
A very rare version, the EM-352 was chambered in 7.62x51mm but it used a modified SVD magazine. Normal NDM-86 rifles chambered in 7.62x51mm have a straight box magazine.