I have wondered the same thing. There isnt a reason why, that I can think of. Its maybe just the same issue as with a 9mm revolver. An excellent idea, and platform, but people are just not willing to change their ideas, and warm to something that is untraditional. The 44 carbine is my last bucket gun. I was able to shoot one recently, for the first time, and I was shocked by the recoil. I didnt expect that much force into my shoulder. I still want one, simply because I think its such a neat idea, but I doubt I will shoot it much. I live in a state that doesnt allow rifles for deer hunting, or that would have been the rifle I would have chosen.