I tried to caught S-300xx "Pusk" !
and which is this model, from S-300 family models ?
It is the second generation, the S-300PM/PMU1/PMU2 (SA-20).
At this system, the too complex matrix of the S-300PS/PMU (SA-10) is simplified.
Pusk is what you see at the left.
Just remember how you launch a missile with the most advanced system of the sim, the Vega.
For Pusk, you need to press two button, Block Puska + Pusk.
Block Puska is the vertical (you select target from the 6 tracked), while Pusk is the horizontal row (you select missile from the launcher, it has 4) of buttons.