All I get is invisible hand and permeability 95% of the time. Plus shadow price doesn't drop that often, for me anyway. I've received three this week. I tried farming last time it was the featured weapon and the same thing. I've received maybe 10 in total all with horrible perks. I I want s4a/vs. I've received a few with s4a but no vs. They had horrible barrels and mags, the other perks weren't that great so deleted them all.