I have plans to do a muzzel loading AK just to piss off the DNR. Im going to do a .458 cal muzzel loader that will take smokeless powder like the savage smokless muzzelloaders. I think a auto loader in black powder would suck you would not be able to see much after the first shot due to the smoke the barrel would need to be very long to get any speed out of the round. and it would be very very dirty very very fast. Im not saying it would not shoot it would just be a pain in the ass. there have already been 45/70/s as well as 444 marlins as well as the 410 and up Sagias that could easly be loaded with black powder. some port work will likely be required.