Look more closely.
It's a NSVT 12.7x108mm, not M2HB QCB 12.7x99mm.
Funny, NSVT was fitted to T-64/72/80 Series (And early T-90 obrig. 1992), Afghans never used these, only T-34/85, T-54B, T-55 & T-62 Series.
BUT sometimes Soviets changed the DSHKM on Soviet operated T-62M in Soviet-Afghan War...