The SRM Arms Model 1216 is a delayed blowback semi-automatic shotgun with a 16-round detachable revolver magazine.Designed for mobility, it is light and short and intended for home defense and law enforcement.The magazine which runs parallel to the barrel is made of four tubes, each with its own spring and follower.The manual safety, charging handle and ejection port can all be removed and relocated to either the left or right side of the receiver to accommodate the operator's preferences.Picatinny Rails line the top and sides of the shotgun allowing a wide variety of attachments such as sights, lasers, and flashlights to be used.