The best self-defense shotgun depends on individual preferences, needs, and factors such as personal comfort, skill level, and home environment. However, there are several popular and highly regarded shotguns often recommended for self-defense purposes. Here are a few examples:

1. Remington 870: The Remington 870 is a reliable and widely used pump-action shotgun known for its durability and versatility. It is available in various configurations and chamberings, offering options suitable for different needs and budgets.

2. Mossberg 500/590: The Mossberg 500/590 series is another popular choice for self-defense shotguns. They are known for their ruggedness, ease of use, and wide availability. Like the Remington 870, the Mossberg 500/590 shotguns come in different models and configurations.

3. Benelli M4: The Benelli M4 is a semi-automatic shotgun with a reputation for reliability and robustness. It is often favored by military and law enforcement personnel due to its durability and smooth cycling.

4. Winchester SXP: The Winchester SXP is a pump-action shotgun known for its fast and reliable cycling. It features an inertia-assisted action, making it easier and quicker to operate.

5. Beretta 1301 Tactical: The Beretta 1301 Tactical is a semi-automatic shotgun designed specifically for tactical and self-defense purposes. It offers fast cycling, low recoil, and enhanced ergonomics.

It's important to note that selecting a self-defense shotgun is a personal decision, and it's highly recommended to try different models and consult with knowledgeable professionals, such as experienced firearm instructors or gun store personnel, to find the shotgun that best suits your needs and preferences. Additionally, ensure that you comply with all applicable laws and regulations regarding firearm ownership and use in your jurisdiction.