A minifig can't grip the SVD and they already made half those weapons.
I think that they could, but they would have to hold it at an angle. Still, I'm pretty sure these are real and may be put into production soon.
And Hoboman, I agree with you. If they really want these to sell, they'll have to sell them at prices roughly equal to Brickarms. Howevr, with the large amount of detail that is already on these weapns, I could see how I could be wrong. I just hope we won't have to pay prices like what's at Hazel or Amazing Armory or whatever it is in order to get some of these. I've been waiting a long time for more soviet-era weapons.