Virginian kinda made the point I had when I started this thread. The tactical guys want capacity, and to do it you either have to box-feed or shorten the shell. I have had a couple threads closed over the latter so I won't go further than to say that 12 ga short shells are the answer to that problem in current pumps. It would be very nice if the same luxury were afforded to other platforms and gauges. There have been some neat ideas come up though, which makes me wonder why the 45gap or other large, long rimless rounds haven't been modified to fit some of these needs. Even an AR could take a shotgun barrel if the ammo were available in the form of a rimless 410, but they would be rather weak. Very interesting concept though, even more interesting is why Saiga didn't do something like this and open source the ammo to help sell their guns. I'm sure they considered it though. And no I'm not talking about thing like 45acp snake shot but a similar round taken out to 2.5ish inches with a shotwad and all, just smaller caliber and AR capable. Like the old 9mm shotgun, but rimless and more powerful.