I don't know about your gun, it looks like it has too many qualities.
It's not meant to be practical or easy to use - even for the player. I'm not aware of any upper limit to the amount of qualities a weapon can have, and any weapon that crosses over classes (hybrid tactical/shotgun) in this case is automatically going to have a bunch of qualities just to not break compatibility with the default rules (NFM, IMP etc. all come just from being a shotgun).
I would decrease the awesomeness of the gun a bit, after all it's now better than a minigun from the book.
How come? It's seriously stunted on the range department. For a Cal V weapon, it's a totally one-trick pony. Between this one and the OICW, the OICW would probably come out in top in all conceivable situations. The minigun also has the GAT quality and tons of more ammo. This one's so ammo-challenged, it's close to being useless on that department, as well.
I think it shows clearly that the modern set of rules we use for guns does not adapt easily to future games.
I disagree. I think that the system still has leeway for near-future (such as cyberpunk) weapons, due to the rather empty calibers IV and V. They'll stretch the system to its max, but I don't think they'll break it yet. I don't think my humorous project came even close to it.
Since I've now been disheartened, does somebody else want to take a look at the Magpul Masada/Bushmaster ACR variants and their calibers? Wiki-p lists 7,62x39mm, 6,5mm Grendel and 6,8mm Remington SPC in addition to the one my amigo ON did earlier.