Ooohhhh. I gotcha. Didn’t realize that’s what they are talking about. I have seen them. Talked to a few people and saw some reviews that said they jam and have some trouble with them. I know someone with a drum fed. Said it was better as a boat anchor..
Actually it was not reported as an AR-15 Shotgun.
Conjunctions are used to separate AR-15 and Shotgun.