You can't mod muzle flashes in soldat like that... the bitmap positioning is screwed up.
As you could've probably seen, the link dead engine could use soldat's polygon maps, and I think this is what it actually is, a polished soldat map, and they are testing the multiplayer and the overal look of the game so they know where they are heading. But it very well could be a photoshoped image, just to excite us.