My guess is that the traditional pump action shotgun market has "matured" and there really hasn't been anything new in a long time so sales are declining. The manufacturers have been pushing tactical models to compete with the interest in tactical guns like the AR. These non-NFA short barrel firearms are different so Mossberg and Remington are hoping to revive interest.I am curious why it took Remington and Mossberg so long to market these Pistol-Grip-Only firearms?