As has been mentioned, slow sales would be the obvious reason for discontinuing the line, however, for those of us looking for a lighter weight, "carry oriented" revolver they were just the ticket. They came in K, L, and N frames in .38spl, .357mag, 10mm, .41mag, .44spl, .44mag, and .45acp. They were all set up the same way - scandium alloy frames, blackened stainless cylinders, XS Big Dot front night sight, Cylinder & Slide Extreme Duty fixed rear sight, and rubber grips.
I have a 327NG, the 8 shot .357mag, that has been tweaked to my liking and it's my favorite field gun, great for all around outdoors carry. Mine sees most of it's holster time when I'm working on the property or out in the woods. I also had a 315, the K frame .38spl version that I foolishly sold to a forum member, another great gun.