The Beretta AL391 is a semi-automatic shotgun. It is manufactured, marketed, and distributed by Fabbrica d'Armi Pietro Beretta, in Gardone Val Trompia, Italy. The AL391 is most often used for hunting birds, and for clay target games such as trap and skeet. There are several different models, each with multiple variations. The AL391 is chambered in either 12 gauge or 20 gauge.