I know in the EU they list it but found it odd they've never included it with a stormtrooper before... always the MG-34 if anything it seemed. The IG-88 gun somehow got mixed in there though along the way, but nobody ever has one that I've ever seen outside Battlefront, in any EU. Someone somewhere probably does, there's so much, but it doesn't come up often. It's a cool extra IMO, just seemed a little odd when they could've gone with one of the Sandie's guns more people recognize.
I threw a couple of those to my troopers (Rebel and Imperial) on my shelves. I sort of give it to Imperial Army troopers or Naval troopers more though, like it's not quite as nice so it gets handed out to the other groups more.
I didn't care for it as a "sniper rifle" like it was promoted as. Seemed awkward for that. I made one from the MG-34 Sandie rifle most Hasbro figures came with, and a Marauder Inc. scope... Looked pretty slick. Gave it to the half-assed camo VTSC Scouts Hasbro did as 41st Elite Clones... I turned them into Imp. Pathfinders and sniper teams.
Too much time on my hands, yeah... I re-read that and came to the same conclusion.