The Mossberg 590 Shockwave is a unique and compact pump-action shotgun that is designed for personal defense and close-quarters situations. The Mossberg 590 Shockwave has a 6-round capacity and is chambered in 12 gauge, making it a powerful and effective option for self-defense. It features a bird's head grip for improved control and handling, as well as a durable construction with a steel barrel and receiver. Overall, the Mossberg 590 Shockwave is a compact and reliable shotgun that offers excellent performance in close-quarters situations.