In Iraq we used some crusty old no-name pump-action shotguns, which worked just fine. You don't really need something as fancy as the AA-12 to blow the hinges off a door. The fact that it is fully automatic is sort of a non-issue when it comes to breaching; your breaching device is supposed to allow your team to enter the room as quickly as possible- one shot to the upper hinge, one shot to the lower, fast as fuck, then a kick next to the doorknob and get through the "fatal funnel" of the doorway and into the room as quickly as possible- not delay things by sending a wild hail of bullets through the door or a fusillade of potential ricochets into the doorframe.
Mind you I was doing this shit circa 2005- for all I know the kids these days are using acid hoses and concrete-flails.
NOT ONLY CAN THE AA12 BREACH THIS LOCKED DOOR, IT CAN ALSO CUT IT IN HALF! BUT WAIT, THERE'S MORE! ORDER IN THE NEXT FIFTEEN MINUTES AND WE'LL DOUBLE YOUR ORDER ABSOLUTELY FREE! YOU GET TWO AA12 SHOTGUNS FOR THE PRICE OF ONE!