Most pump-action and semi-automatic shotguns that are fed via a tube magazine utilize a plug to limit the number of rounds that can be loaded into the magazine. This is done to be compliant with most states hunting regulations. This Universal Shotgun Plug by Allen® is a must-have for anyone who hunts using a shotgun. Injection-molded from rugged polymer; this plug can be trimmed to a specific size if necessary, for fine-tuning with various lengths of shotgun shells. Our Universal Shotgun Plug is easy to install and fits inside the spring when installed it won't cause binding or damage to the spring, tube, or follower.