(Used) Semi-auto, 12ga, 20" barrel, 5+1, 2 mags. The MKA 1923 combines the speed and maneuverability of a traditional bullpup with the stopping power of the quintessential shotgun. Its overall design is compact, but it can definitely pack a punch. Making this compact beast the perfect tool for home protection, 3-gun competition, or even just some fun on the range. This easy-handling shotgun features a trigger block thumb safety, a rubber butt plate, a reinforced nylon stock, a receiver rail, and removable fully adjustable rear sights