The TacStar Sidesaddle mounts 6 extra rounds on shotguns in an accessible location for fast reloading. The weatherproof shell carrier is attached to an aluminum mounting plate that installs directly on the shotgun receiver. All mounting screws are included, no gunsmithing required. Note: some field grade shotguns may require a modification to the shotgun's forend. Shotguns using the TacStar pistol grip forend do not require modification.