I dont really see a market for this gun. A 223 pump with an ar mag.. well , what a chore cycling 30 rounds.
Just curious, but have you ever shot a pump action rifle ? I am guessing not. It really is not that hard to cycle 5 or even 10 rounds through one, and I havn't had the chance to try 20 or even 30. Are they as "easy" as a semi - no, but they don't make you as lazy either. Semi-auto rifles tend to make shooters lazy, and inferior shots, because they know, all they have to do is pull the trigger again. Now, don't get me wrong, I own an AR and would like to get a couple more in various calibers. But they are not the holy grail like some like to think.
Several of your comments are very similiar to what I constantly hear from others. "I just don't get it" and "I see no market for this". well, until you shoot one a few times, you probably won't, but that's OK, I enjoy taking people like you out to shoot. Pump action rifles are alot of fun to shoot. And if you still don't get it, well, that's fine, not everyone likes a pump. To each their own. Now your comment "they are just a little bit faster than a bolt", I completely disagree with. A pump and a bolt are not even close, its more like, the pump is just a little slower than a semi.
Loaded4bear pointed out it's police applications, but for a field rifle or ranch rifle, and that is how I look at the 7615, I would much rather have a pump action over a semi. And the two reasons why are, when you get a misfire, and they do happen, you can cycle in a new round without your hands even leaving the rifle. My second reason is when you get a jam or failure to extract or a double feed, you can clean it out without your hands leaving the rifle as well.
Is this rifle designed for sitting at a bench, no, of course not. It is designed to be a rifle used in the field. And I would much rather have a 7615 than a mini-14.