Shotgun functions in open or closed position. Includes rear pistol grip. Quick release button allows stock to lock in folded or unfolded positions. Sling swivel stud included. Ambidextrous. Stock is pre-drilled to accept shell holder. Shotshell Holder sold separately (SHO0500). Mounting Hardware and Adapters Included. Stock Fits: 12/20GA Mossberg 500/590, Remington 870, Winchester 1200/ 1300 & Maverick 88.