Blackhawk bought out or was joined to the original company that produced your stock. I can't remember the name offhand but I shot a shotgun with an early version many years ago. That gun was modified with this stock for an individual officer to use as they had problems with the issued slug and buckshot loads. In my limited experience, I don't know of any other department is sing these stocks.
The design received a lot of hype when it came out but quickly fell out of the picture. What I seem to recall is the stock did not weather adverse field conditions very well. When one could clean it every day in difficult circumstances it seemed fine but dirt, grit, chaff, ice, et al seemed to do it in. I did not see any of these stocks used in any sort of shotgun competition though there might be some usage now that Blackhawk puts their name on them and there are a fair number of shooters sponsored by Blackhawk.
I don't recall the stock having a high comb but that does not mean there weren't changes made later on to fit perceived market need. I would consider a red dot of some sort as centering the target in the sight will get one pretty close at house distances even if the dot is not turned on. My HD carbine is set up like that and I don't have any trouble quickly hitting a B-27 target at 10-25 feet in low light conditions. The trick is to get glass with very little tint as that works like sunglasses making it hard to see more than very general shapes in the dark.
