Quick overview by Taiwan Gun of the APS MK-2 Street Sweeper Revolver Airsoft Shotgun. The iconic "Street Sweeper" shotgun, a real-life 12-gauge with a revolving cylinder, is available in Airsoft form thanks to APS. Though highly restricted in the real world due to its firepower, this Airsoft version (12-MK2 and 12-MK3) offers two firing options (Green Gas or CO2) and realistic rotating shells for an immersive airsoft experience.