left to right, STs-130PT (sniper), STs-130PT2 (sniper with solid bronze bullet), STs-130VPS (high penetration / armor piercing).
Dvorianinov 10x54R. It was designed so the sabots would cling on the flechette and the once exiting the barrel they would stabilise the rod by spinning in opposite directions. Interestingly the AO has been described as a scaled down copy of a 100mm tank gun. Dvorianinov is also the man behind the modern 7.62x54R API/AP rounds
compact assault rifle in 5.45x39, 20-round special magazine (on photo) or standart AK-74/RPK-74 magazines, weight of empty 20-rd magazine 0.14 kg (0.31 lbs), weight of rifle without magazine 2 kg (4.41 lbs) competitor to aks47u