Dayton, no sir, the feeding issue is the length of the shell itself. The chamber is not designed to properly guide and feed the shorter shells. The mini shells are best suited for single shot or double barrelled guns, although some pump action guns will cycle them, such as the Winchester 1300 and the Mossberg 590S.

Dayton, it's very unlikely that the shorter shells would have enough velocity/energy to properly cycle the bolt all the way back causing jams and essentially making it a single shot. This has a 3 inch chamber so 2-3/4 inch and 3 inch shells will function no problem. Almost any semi automatic won't function properly with mini shells. Sorry but hope this helps.

The shorty shells will not be able to chamber due to the length and will get hung up. Shotguns like the Mossberg 590s can handle them. The others in the Mossberg line can utilize the Opsol adapter to use shorty shells.

Hi Dayton, unfortunately it likely won't. I have a similar 12ga Bullpup and it does not handle the 1.75's well at all. 2.75 and 3 inch are not an issue. Cheers and stay safe!